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Multi‐system involvement in a severe variant of fibrodysplasia ossificans progressiva (ACVR1 c.772G>A; R258G): A report of two patients
Severe variants of fibrodysplasia ossificans progressiva (FOP) affect <2% of all FOP patients worldwide, but provide an unprecedented opportunity to probe the phenotype–genotype relationships that propel the pathology of this disabling disease. We evaluated two unrelated children who had severe reduction deficits of the hands and feet with absence of nails, progressive heterotopic ossification, hypoplasia of the brain stem, motor and cognitive developmental delays, facial dysmorphology, small malformed teeth, and abnormal hair development. One child had sensorineural hearing loss, microcytic anemia, and a tethered spi...
Source: American Journal of Medical Genetics Part A - June 11, 2015 Category: Genetics & Stem Cells Authors: Frederick S. Kaplan, Joyce A. Kobori, Carmen Orellana, Inmaculada Calvo, Monica Rosello, Francisco Martinez, Berta Lopez, Meiqi Xu, Robert J. Pignolo, Eileen M. Shore, Jay C. Groppe Tags: Research Article Source Type: research

Osteochondromas in fibrodysplasia ossificans progressiva: a widespread trait with a streaking but overlooked appearance when arising at femoral bone end
Abstract Metaphyseal bony outgrowths are a well-recognized feature of fibrodysplasia ossificans progressiva (FOP) phenotype, but its genuine frequency, topographic distribution, morphological aspect, and potential implications are not fully established. To better ascertain the frequency and characteristics of osteocartilaginous exostoses in FOP disease, we conducted a cross-sectional radiological study based on all the traceable cases identified in a previous comprehensive national research. Metaphyseal exostoses were present in all the 17 cases of FOP studied. Although most often arising from the distal femor...
Source: Rheumatology International - June 6, 2015 Category: Rheumatology Source Type: research

Muscle imaging in fibrodysplasia ossificans progressiva: the neurologist's perspective
• Fibrodysplasia ossificans progressiva is a rare disease of skeletal muscle.• Experts in the field of neuromuscular disorders should be aware of FOP.• Muscle imaging can be helpful in the identification of this disease. (Source: Neuromuscular Disorders)
Source: Neuromuscular Disorders - May 12, 2015 Category: Neurology Authors: Giorgio Tasca, Adele D'Amico, Margherita Verardo, Alberto Villani, Paolo Siani, Daniele De Brasi, Enrico Bertini, Renata Boldrini Tags: Picture of the Month Source Type: research

Classical and Atypical Fibrodysplasia Ossificans Progressiva in India
We report 14 cases presenting to a referral institution in South India over a 3‐year period. The patients were clinically diagnosed based on foot abnormality or abnormal ectopic ossification and were screened for ACVR1. The genetic analysis of ACVR1 identified the recurrent allelic variant in 12 of 14 patients. One of the remaining patients had a previously reported allele c.1067G>A; p.G356D in the 9th exon and the second allele c.983G>A; p.G328E in the 8th exon of ACVR1. The most common recurrent allele c.617 G>A; p.R206H is also the most common in Indian patients with FOP. (Source: Annals of Human Genetics)
Source: Annals of Human Genetics - May 1, 2015 Category: Genetics & Stem Cells Authors: Vrisha Madhuri, Mona Santhanam, Legasri K Sugumar, Karthikeyan Rajagopal, Sanjay K Chilbule Tags: Regular manuscript Source Type: research

Patient-Reported Physical Function Outcome Measure for Adults With Fibrodysplasia Ossificans Progressiva: Intelligent Test Design Based on Promis Item Banks
The objective was to develop a measure of physical function (PF) in adults with FOP. (Source: Value in Health)
Source: Value in Health - May 1, 2015 Category: Global & Universal Authors: M.S. Mattera, F.S. Kaplan, R.J. Pignolo, D. Grogan, D.A. Revicki Source Type: research

Recent topics in fibrodysplasia ossificans progressiva
Publication date: August 2012 Source:Journal of Oral Biosciences, Volume 54, Issue 3 Author(s): Takenobu Katagiri Fibrodysplasia ossificans progressiva (FOP) is a rare autosomal dominant disorder characterized by progressive heterotopic bone formation in skeletal muscle tissue. Patients with FOP show malformed digits, osteochondroma, and other skeletal abnormalities due to abnormal patterning during development. Heterozygous mutations in the Activin A receptor type I (ACVR1) gene, which encodes the bone morphogenetic protein (BMP) type I receptor ALK2, have been identified in not only typical FOP patients but also patien...
Source: Journal of Oral Biosciences - April 24, 2015 Category: Biomedical Science Source Type: research

Atypical fibrodysplasia ossificans progressiva diagnosed by whole‐exome sequencing
Fibrodysplasia ossificans progressiva (FOP) is a rare genetic disorder characterized by congenital malformations of the great toes and progressive heterotopic ossification of connective tissue that begins during the first decade of life. Our patient presented with intrauterine growth retardation, respiratory distress, neonatal onset soft tissue masses, bilateral hallux valgus, and congenital anomalies of the thyroid and uterus. She was initially diagnosed with atypical infantile myofibromatosis based on clinical and pathological findings. She underwent whole‐exome sequencing (WES) as part of the FORGE study to identify t...
Source: American Journal of Medical Genetics Part A - April 21, 2015 Category: Genetics & Stem Cells Authors: Hao Liu, Sarah L Sawyer, Monika Gos, David Grynspan, Kheirie Issa, Raveena Ramphal, Carmen Rotaru, FORGE Canada Consortium, Jacek Majewski, Kym M Boycott, Gail Graham, Matthew Bromwich Tags: Clinical Report Source Type: research

Fibrodysplasia ossificans progressiva presenting as a painful swelling of the sternocleidomastoid muscle
We report a case of fibrodysplasia ossificans progressiva (FOP) initially presenting as a neck mass. The importance of this lesion is that it should be considered in the clinical differential diagnosis of swellings in the neck. Physicians should be aware of this condition in order to make a timely diagnosis and avoid unnecessary therapies. (Source: Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology)
Source: Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology - March 26, 2015 Category: ENT & OMF Source Type: research

Fibrodysplasia ossificans progressiva in a newborn with cardiac involvement
We report the case of a child with halluces valgi at birth, along with two tender, firm, immovable masses located on the right and left parietal–occipital region, a transitory subluxation of the right hip and an unusual ventricular septal hypertrophy. We hypothesize that the ventricular septal hypertrophy could be the result of a thickening of the fibrous portion of the septum, and a possible new element of the phenotype, probably resulting from the mechanical stimuli secondary to the significant hemodynamic changes occurring at birth. (Source: Pediatrics International)
Source: Pediatrics International - March 25, 2015 Category: Pediatrics Authors: Lucia Marseglia, Gabriella D'Angelo, Sara Manti, Alessandro Manganaro, Maria Pia Calabrò, Carmelo Salpietro, Eloisa Gitto Tags: Patient Report Source Type: research

New Protocol to Optimize iPS Cells for Genome Analysis of Fibrodysplasia Ossificans Progressiva
This article is protected by copyright. All rights reserved. (Source: Stem Cells)
Source: Stem Cells - March 1, 2015 Category: Stem Cells Authors: Yoshihisa Matsumoto, Makoto Ikeya, Kyosuke Hino, Kazuhiko Horigome, Makoto Fukuta, Makoto Watanabe, Sanae Nagata, Takuya Yamamoto, Takanobu Otsuka, Junya Toguchida Tags: Original Research Source Type: research

Bilateral myositis ossificans of the masseter muscle after chemoradiotherapy and critical illness neuropathy-report of a rare entity and review of literature.
Myositis ossificans in the head and neck is a rare heterotropic bone formation within a muscle. Besides fibrodysplasia ossificans progressiva, traumatic and neurogenic forms are described in the literature. We are presenting the case of a 35-year-old female patient with a very rare form of MO of both masseter muscles after 4 weeks of intensive care because of complications (critical illness neuropathy) after chemotherapy. Therefore, special attention should be paid to surgical trauma. As in the present case, radiotherapy, long-time intubation with immobilization and critical myopathy and neuropathy can cause MO with severe...
Source: Head and Neck Oncology - February 13, 2015 Category: Cancer & Oncology Source Type: research

FOP: still turning into stone
Abstract Fibrodysplasia ossificans progressiva (FOP) is a rare catastrophic genetic condition of extraskeletal (heterotopic) ossification. One in every two million people is affected worldwide, with no ethnic, racial, gender, or geographic predisposition. Most cases of FOP arise from a spontaneous missense mutation in the gene encoding bone morphogenic protein (BMP) type II receptor (ACVR1/ALK2). Affected individuals are normal at birth apart from malformed great toes. Onset of clinical symptoms is usually in the first decade of life, presenting with episodic emergence of painful rapidly appearing tumor-like soft...
Source: Clinical Rheumatology - January 26, 2015 Category: Rheumatology Source Type: research

Clinical Utility Gene Card for: Fibrodysplasia ossificans progressiva
cesc Ventura, Genevieve Beaujat, Elizabeth M W Eekhoff & Gerard Pals (Source: European Journal of Human Genetics)
Source: European Journal of Human Genetics - January 21, 2015 Category: Genetics & Stem Cells Authors: Nathalie BravenboerDimitra MichaJames T TriffitAlex N BullockRoberto RavazolloRenata BocciardiMaja di RoccoJ Coen NetelenbosPeter Ten DijkeGonzalo Sánchez-DuffhuesFred S KaplanEileen M ShoreRobert J PignoloPetra SeemannFrancesc VenturaGenevieve BeaujatEl Source Type: research

A small molecule targeting ALK1 prevents Notch cooperativity and inhibits functional angiogenesis
Abstract Activin receptor-like kinase 1 (ALK1, encoded by the gene ACVRL1) is a type I BMP/TGF-β receptor that mediates signalling in endothelial cells via phosphorylation of SMAD1/5/8. During angiogenesis, sprouting endothelial cells specialise into tip cells and stalk cells. ALK1 synergises with Notch in stalk cells to induce expression of the Notch targets HEY1 and HEY2 and thereby represses tip cell formation and angiogenic sprouting. The ALK1-Fc soluble protein fusion has entered clinic trials as a therapeutic strategy to sequester the high-affinity extracellular ligand BMP9. Here, we determined the crystal ...
Source: Angiogenesis - January 4, 2015 Category: Molecular Biology Source Type: research

Molecular, Phenotypic Aspects and Therapeutic Horizons of Rare Genetic Bone Disorders.
Abstract A rare disease afflicts less than 200,000 individuals, according to the National Organization for Rare Diseases (NORD) of the United States. Over 6,000 rare disorders affect approximately 1 in 10 Americans. Rare genetic bone disorders remain the major causes of disability in US patients. These rare bone disorders also represent a therapeutic challenge for clinicians, due to lack of understanding of underlying mechanisms. This systematic review explored current literature on therapeutic directions for the following rare genetic bone disorders: fibrous dysplasia, Gorham-Stout syndrome, fibrodysplasia ossific...
Source: Biomed Res - December 26, 2014 Category: Research Authors: Faruqi T, Dhawan N, Bahl J, Gupta V, Vohra S, Tu K, Abdelmagid SM Tags: Biomed Res Int Source Type: research

Activin Signaling Disruption in the Cochlea Does Not Influence Hearing in Adult Mice
In this study, we present for the first time the presence of activin A and ActRIB in the adult cochlea. Transgenic mice with postnatal dominant-negative ActRIB expression causing disruption of activin signaling in vivo were used for assessing cochlear morphology and hearing ability through the auditory brainstem response (ABR) threshold. Nonfunctioning ActRIB did not affect the ABR thresholds and did not alter the microscopic anatomy of the cochlea. We conclude, therefore, that activin signaling is not necessary for hearing in adult mice under physiological conditions but may be important during and after damaging events i...
Source: Audiology and Neurotology - November 25, 2014 Category: Audiology Source Type: research

Fibrodysplasia Ossificans Progressiva: Clinical Course, Genetic Mutations and Genotype-Phenotype Correlation
Fibrodysplasia ossificans progressiva (FOP, MIM 135100) is a rare autosomal dominant genetic disorder and the most disabling condition of heterotopic (extraskeletal) ossification in humans. Mutations in the ACVR1 gene (MIM 102576) were identified as a genetic cause of FOP [Shore et al., 2006]. Most patients with FOP have the same recurrent single nucleotide change c.617G>A, p.R206H in the ACVR1 gene. Furthermore, 11 other mutations in the ACVR1 gene have been described as a cause of FOP. Here, we review phenotypic and molecular findings of 130 cases of FOP reported in the literature from 1982 to April 2014 and discuss poss...
Source: Molecular Syndromology - November 7, 2014 Category: Molecular Biology Source Type: research

Is “Fibrodysplasia Ossificans Progressiva” a Vascular Disease? A Groundbreaking Pathogenic Model
Publication date: November–December 2014 Source:Reumatología Clínica (English Edition), Volume 10, Issue 6 Author(s): Antonio Morales-Piga , Francisco Javier Bachiller-Corral , Gonzalo Sánchez-Duffhues Fibrodysplasia ossificans progressiva is the most severe and disabling disorder of ectopic ossification in humans. It is characterized by congenital skeletal abnormalities in association with extraskeletal widespread endochondral osteogenesis. Virtually all patients show the same mutation in the “activin A type-I/activin-like kinase-2” receptor encoding gene. As a result of this discovery there have been significa...
Source: Reumatologia Clinica - November 6, 2014 Category: Rheumatology Source Type: research

The type I BMP receptor ACVR1/ALK2 is required for chondrogenesis during development
This article is protected by copyright. All rights reserved (Source: Journal of Bone and Mineral Research)
Source: Journal of Bone and Mineral Research - November 1, 2014 Category: Orthopaedics Authors: Diana Rigueur, Sean Brugger, Teni Anbarchian, Jong Kil Kim, Yoo Jin Lee, Karen Lyons Tags: Original Article Source Type: research

Clementia begins Phase II extension trial of palovarotene to treat FOP patients
Canada-based Clementia Pharmaceuticals has started a Phase II extension trial of palovarotene, an investigational retinoic acid receptor gamma agonist, to treat patients with fibrodysplasia ossificans progressiva (FOP), a rare and severely disabling … (Source: Drug Development Technology)
Source: Drug Development Technology - October 28, 2014 Category: Pharmaceuticals Source Type: news

Heterotopic Ossification in Fibrodysplasia Ossificans Progressiva
A 7-year-old girl presented with hard, painful lumps over her neck, back, and thighs, which had gradually developed and progressively worsened over the past few years. There was no significant history of trauma. Physical examination revealed smooth, mobile, bony-hard masses, which did not arise from the skeleton. She also had significant neck stiffness, clinodactyly, and hallux valgus (Figure, A). Radiographs revealed prominent ossification of the ligamentum nuchae, fusion of the posterior elements of cervical spine (Figure, B), and a band-like angular area of heterotopic ossification (HO) over the left lower hemithorax an...
Source: The Journal of Pediatrics - October 24, 2014 Category: Pediatrics Authors: Akshay Sharma, Miriam Behar Tags: Insights and Images Source Type: research

Fibrodysplasia ossificans progressiva: bilateral hallux valgus on ultrasound a clue for the first prenatal diagnosis for this condition –clinical report and review of the literature
We present the first case of prenatal diagnosis of fibrodysplasia ossificans progressiva.Fetal bilateral hallux valgus, seen on second‐trimester ultrasound prompted the clinicians to consider this diagnosis even though family history was negative for FOP. The fetus had the recurrent c.617G>A mutation in ACVR1 gene.This case illustrates that FOP should be considered in the differential diagnosis of fetal hallux valgus to provide appropriate genetic counseling. (Source: Prenatal Diagnosis)
Source: Prenatal Diagnosis - October 1, 2014 Category: Perinatology & Neonatology Authors: Catalina Maftei, Françoise Rypens, Isabelle Thiffault, Johanne Dubé, Anne‐Marie Laberge, Emmanuelle Lemyre Tags: Research Letter Source Type: research

The girl whose joints and muscles are turning to STONE: Horrific rare condition causes sufferers to become imprisoned in a second skeleton - which eventually suffocates them
Ni Min, 14, from China's Sichuan Province, suffers from the condition fibrodysplasia ossificans progressiva (FOP), also dubbed 'stone man' syndrome. (Source: the Mail online | Health)
Source: the Mail online | Health - September 25, 2014 Category: Consumer Health News Source Type: news

Genes, Vol. 5, Pages 792-803: The Revolution in Human Monogenic Disease Mapping
The successful completion of the Human Genome Project (HGP) was an unprecedented scientific advance that has become an invaluable resource in the search for genes that cause monogenic and common (polygenic) diseases. Prior to the HGP, linkage analysis had successfully mapped many disease genes for monogenic disorders; however, the limitations of this approach were particularly evident for identifying causative genes in rare genetic disorders affecting lifespan and/or reproductive fitness, such as skeletal dysplasias. In this review, we illustrate the challenges of mapping disease genes in such conditions through the ultra-...
Source: Genes - September 5, 2014 Category: Genetics & Stem Cells Authors: Emma DuncanMatthew BrownEileen Shore Tags: Review Source Type: research

Structure–Activity Relationship of 3,5-Diaryl-2-aminopyridine ALK2 Inhibitors Reveals Unaltered Binding Affinity for Fibrodysplasia Ossificans Progressiva Causing Mutants
Journal of Medicinal ChemistryDOI: 10.1021/jm501177w (Source: Journal of Medicinal Chemistry)
Source: Journal of Medicinal Chemistry - September 4, 2014 Category: Chemistry Authors: Agustin H. Mohedas, You Wang, Caroline E. Sanvitale, Peter Canning, Sungwoon Choi, Xuechao Xing, Alex N. Bullock, Gregory D. Cuny and Paul B. Yu Source Type: research

ACVR1 in FOP and DIPG
Whole-genome sequencing studies have recently identified a quarter of cases of the rare childhood brainstem tumor diffuse intrinsic pontine glioma to harbor somatic mutations in ACVR1. This gene encodes the type I bone morphogenic protein receptor ALK2, with the residues affected identical to those that, when mutated in the germline, give rise to the congenital malformation syndrome fibrodysplasia ossificans progressiva (FOP), resulting in the transformation of soft tissue into bone. This unexpected link points toward the importance of developmental biology processes in tumorigenesis and provides an extensive experience in...
Source: Cancer Research - September 1, 2014 Category: Cancer & Oncology Authors: Taylor, K. R., Vinci, M., Bullock, A. N., Jones, C. Tags: Review Source Type: research

Fibrodysplasia ossificans progressiva: a case report.
In this report, the importance of the decision to perform surgery has been stressed. PMID: 26022598 [PubMed - in process] (Source: The Turkish Journal of Pediatrics)
Source: The Turkish Journal of Pediatrics - September 1, 2014 Category: Pediatrics Authors: Önal M, Bajin MD, Yılmaz T Tags: Turk J Pediatr Source Type: research

Clementia begins Phase II trial of palovarotene to treat fibrodysplasia ossificans progressiva
Canada-based Clementia Pharmaceuticals has started a double-blind, placebo-controlled Phase II clinical trial of palovarotene to treat fibrodysplasia ossificans progressiva (FOP), a rare, severely disabling genetic disease. (Source: Drug Development Technology)
Source: Drug Development Technology - July 14, 2014 Category: Pharmaceuticals Source Type: news

ALK2 Signaling Enhances Osteoclast Formation [Molecular Bases of Disease]
In conclusion, this study demonstrated that the causal mutation transfection of fibrodysplasia ossificans progressiva in myoblasts enhanced the formation of osteoclasts from its precursor through TGF-β in muscle tissues. (Source: Journal of Biological Chemistry)
Source: Journal of Biological Chemistry - June 12, 2014 Category: Chemistry Authors: Yano, M., Kawao, N., Okumoto, K., Tamura, Y., Okada, K., Kaji, H. Tags: Cell Biology Source Type: research

Evaluation of the Cellular Origins of Heterotopic Ossification.
Abstract EDUCATIONAL OBJECTIVES As a result of reading this article, physicians should be able to: 1. Update the current knowledge about candidate cell populations as heterotopic ossification (HO) contributors. 2. Understand the potential limitations of the experimental designs and techniques underlying the identification of putative HO contributors. 3. Clarify the confusion about the phenotypes of candidate populations in the literature. 4. Contrast the fundamental cellular differences between HO and normal skeletogenesis to identify potential disease-specific targets. Heterotopic ossification (HO), acquired or he...
Source: Orthopedics - May 1, 2014 Category: Orthopaedics Authors: Kan L, Kessler JA Tags: Orthopedics Source Type: research

Recurrent activating ACVR1 mutations in diffuse intrinsic pontine glioma
We report the identification of recurrent activating mutations in the ACVR1 gene, which encodes a type I activin receptor serine/threonine kinase, in 21% of DIPG samples. Strikingly, these somatic mutations (encoding p.Arg206His, p.Arg258Gly, p.Gly328Glu, p.Gly328Val, p.Gly328Trp and p.Gly356Asp substitutions) have not been reported previously in cancer but are identical to mutations found in the germ line of individuals with the congenital childhood developmental disorder fibrodysplasia ossificans progressiva (FOP) and have been shown to constitutively activate the BMP–TGF-β signaling pathway. These mutations r...
Source: Nature Genetics - April 6, 2014 Category: Genetics & Stem Cells Authors: Kathryn R TaylorAlan MackayNathalène TruffauxYaron S ButterfieldOlena MorozovaCathy PhilippeDavid CastelCatherine S GrassoMaria VinciDiana CarvalhoAngel M CarcabosoCarmen de TorresOfelia CruzJaume MoraNatacha Entz-WerleWendy J IngramMichelle MonjeDarren Tags: Letter Source Type: research

Clinical Aspects And Conservative Dental Management of a Patient With Fibrodysplasia Ossificans Progressiva
Fibrodysplasia ossificans progressiva (FOP) is a rare genetic disease characterized by skeletal malformations and ectopic ossifications in skeletal muscles, tendons, ligaments, and aponeurosis. Exacerbation of these ossifications can be caused by dental treatment. Man, 26, with a diagnosis of FOP was referred for dental treatment. Conservative dental procedures, such as oral hygiene instructions and recurrent topical fluoride applications, were performed in addition to endodontic and restorative treatments. Brief dental appointments were conducted without using regional anesthesia or dental dam clamps. The dental chair was...
Source: Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics - January 21, 2014 Category: ENT & OMF Authors: CLARISSA PESSOA FERNANDES, FRANCISCO ARTUR FORTE OLIVEIRA, MALENA REGINA FREITAS E SILVA, RENATA VERAS CARVALHO MOURÃO OKA, CAMILA CARVALHO DE OLIVEIRA, MÁRIO ROGÉRIO LIMA MOTA, ANA PAULA NEGREIROS NUNES ALVES Tags: Online Only Articles Source Type: research

Stem cells used to model disease that causes abnormal bone growth (EurekAlert, 7 January 2014)
A US-Japan&nbsp;study&nbsp;published in the&nbsp;Orphanet Journal of Rare Diseases&nbsp;uses stem cells obtained from patients with the rare genetic condition&nbsp;fibrodysplasia ossificans progressiva to model abnormal bone growth, which the authors suggest could also&nbsp;model similar destructive processes occuring following major trauma. Full article (Source: Society for Endocrinology)
Source: Society for Endocrinology - January 9, 2014 Category: Endocrinology Source Type: news

[Erratum]A Correction to the Editors' Choice Summary Titled "Keeping Bone Where Bone Belongs" by Leslie K. Ferrarelli
Activating mutations in GNAS were mistakenly attributed as causing fibrodysplasia ossificans progressiva, instead of fibrous dysplasia. (Source: Signal Transduction Knowledge Environment)
Source: Signal Transduction Knowledge Environment - December 18, 2013 Category: Science Authors: Nancy Gough (mailto:ngough at aaas.org) Source Type: news

Induced pluripotent stem cells from patients with human fibrodysplasia ossificans progressiva show increased mineralization and cartilage formation
Conclusions: Our findings establish a FOP disease cell model for in vitro experimentation and provide a proof-of-concept for using human iPS cell models to understand human skeletal disorders. (Source: Orphanet Journal of Rare Diseases)
Source: Orphanet Journal of Rare Diseases - December 9, 2013 Category: Internal Medicine Authors: Yoshihisa MatsumotoYohei HayashiChristopher SchlieveMakoto IkeyaHannah KimTrieu NguyenSalma SamiShiro BabaEmilie BarruetAkira NasuIsao AsakaTakanobu OtsukaShinya YamanakaBruce ConklinJunya ToguchidaEdward Hsiao Source Type: research

Fibrodysplasia ossificans progressiva: a case report.
Abstract Fibrodysplasia ossificans progressiva or myositis ossificans is a rare disease characterised by bony deposits or the ossification of soft tissues. It transforms skeletal muscles, tendons, ligaments, fascia, and aponeuroses into heterotopic bony deposits through an endochondral process. This leads to progressive immobility; patients are usually wheelchair-bound by the second decade of life and die of thoracic insufficiency by the fourth decade of life. There is no treatment apart from symptomatic treatment with steroids during flare-ups. Excision of heterotopic ossification is not recommended as it can prov...
Source: Journal of Orthopaedic Surgery - December 1, 2013 Category: Orthopaedics Authors: Dhamangaonkar AC, Tawari AA, Goregaonkar AB Tags: J Orthop Surg (Hong Kong) Source Type: research

Fibrodysplasia ossificans progressiva presenting as a neck mass
(Source: International Journal of Pediatric Otorhinolaryngology)
Source: International Journal of Pediatric Otorhinolaryngology - December 1, 2013 Category: ENT & OMF Tags: Abstracts Source Type: research

ACVR1 (587T>C) mutation in a variant form of fibrodysplasia ossificans progressiva: Second report
We report on the second patient worldwide with ACVR1 (587T>C) mutation. A 22‐year‐old Japanese male with no family history of heterotopic ossification did not show any malformation of the great toes and showed normal development from birth to the age of 17 years, when heterotopic ossification appeared in the lumbar area. The clinical symptoms were similar to those reported previously: the delayed onset with a slower and mild clinical course and little finger camptodactyly. Gene analysis revealed that the patient was heterozygous for ACVR1 (587T>C) mutation, the same one as reported in 2011, suggesting a correlati...
Source: American Journal of Medical Genetics Part A - November 20, 2013 Category: Genetics & Stem Cells Authors: Y. Nakahara, T. Katagiri, N. Ogata, N. Haga Tags: Clinical Report Source Type: research

The phenotype and genotype of fibrodysplasia ossificans progressiva in China: A report of 72 cases
Abstract: Fibrodysplasia ossificans progressiva, an ultra-rare and disabling genetic disorder of skeletal malformations and progressive heterotopic ossification (HO), is the most catastrophic condition of skeletal metamorphosis in humans. We studied 72 patients with FOP in China and analyzed their phenotypes and genotypes comprising the world's largest ethnically homogeneous population of FOP patients. Ninety-nine percent of patients (71/72 cases) were of Han nationality; and 1% of patients (1/72 cases) were of Hui nationality. Based on clinical examination, 92% of patients (66/72 cases) had classic FOP; 4% of patients (3/...
Source: Bone - November 1, 2013 Category: Orthopaedics Authors: Wei Zhang, Keqin Zhang, Lige Song, Jing Pang, Hongxing Ma, Eileen M. Shore, Frederick S. Kaplan, Peijun Wang Tags: Original Articles Source Type: research

Perhexiline maleate in the treatment of fibrodysplasia ossificans progressiva: an open-labeled clinical trial
Conclusions: We could not prove the efficacy of oral Pex administration in the prevention of heterotopic ossifications in FOP. Serum levels of ALP and BAP appear to be promising biomarkers for monitoring the development of ectopic ossifications and efficacy of the therapy. Quantification of change in the total bone volume by whole body CT scanning could be a reliable evaluation tool for disease progression in forthcoming clinical trials of FOP. (Source: Orphanet Journal of Rare Diseases)
Source: Orphanet Journal of Rare Diseases - October 16, 2013 Category: Internal Medicine Authors: Hiroshi KitohMasataka AchiwaHiroshi KanekoKenichi MishimaMasaki MatsushitaIzumi KadonoJohn HorowitzBenedetta SallustioKinji OhnoNaoki Ishiguro Source Type: research

Identification and characterization of regulatory elements in the promoter of ACVR1, the gene mutated in Fibrodysplasia Ossificans Progressiva
Conclusions: Our results showed that several transcription factors such as Egr-1, Egr-2, ZBTB7A/LRF, and Hey1, regulate the ACVR1 promoter by binding to the -762/-308 region, which is essential to confer maximal transcriptional activity. The Sp1 transcription factor acts at the most proximal promoter segment upstream of the transcription start site. We observed significant differences in different cell types suggesting tissue specificity of transcriptional regulation. These findings provide novel insights into the molecular mechanisms that regulate expression of the ACVR1 gene and that could be targets of new strategies fo...
Source: Orphanet Journal of Rare Diseases - September 18, 2013 Category: Internal Medicine Authors: Francesca GiacopelliSerena CappatoLaura TonachiniMarzia MuraSimona Di LascioDiego FornasariRoberto RavazzoloRenata Bocciardi Source Type: research

Fibrodysplasia ossificans progressiva presenting as a neck mass
Abstract: Objective: To report a case of fibrodysplasia ossificans progressiva (FOP) initially presenting as a neck mass and alert the practicing otolaryngologist to the imperative to avoid harmful biopsy.Case: A 2-year-old male presented with a firm left posterior neck mass and bilateral great toe malformations. Imaging was non-diagnostic and after 2 weeks of antibiotics the lesion was larger. At surgical biopsy, the mass was pale, firm, and avascular. Histopathology showed low grade fibromyxoid tissue. Rheumatology service diagnosed FOP based on clinical examination of neck mass, bilateral great toe deformities, stiff jo...
Source: International Journal of Pediatric Otorhinolaryngology Extra - September 9, 2013 Category: ENT & OMF Authors: Robert J. Tibesar, Lindsay Eisler, Mona M. LaPlant, James D. Sidman Tags: Case reports Source Type: research

Girl, 17, battling rare disease that turns muscle into a second skeleton and will turn her into a living STATUE
Seanie Nammock, from West London, is suffering from fibrodysplasia ossificans progressiva (FOP), a condition that is turning her muscle and tendon into bone. (Source: the Mail online | Health)
Source: the Mail online | Health - July 29, 2013 Category: Consumer Health News Source Type: news

The skeleton in the closet.
Abstract The origins of fibrodysplasia ossificans progressiva (FOP) in human history are unknown but the condition has been well described since Freke's account in 1740. Important contributions by physicians and scientists in the past two and a half centuries have converged on the remarkable skeleton of Harry Eastlack at The Mutter Museum of The College of Physicians in Philadelphia. PMID: 23810943 [PubMed - as supplied by publisher] (Source: Gene)
Source: Gene - June 25, 2013 Category: Genetics & Stem Cells Authors: Kaplan FS Tags: Gene Source Type: research

Treatment of an intractable cutaneous ulcer in the right lateral malleolus in fibrodysplasia ossificans progressiva.
Abstract Abstract is missing (Letter). PMID: 23722929 [PubMed - as supplied by publisher] (Source: Acta Dermato-Venereologica)
Source: Acta Dermato-Venereologica - May 27, 2013 Category: Dermatology Authors: Matsuda K, Goto M, Ito Y, Shimizu F, Hatan Y, Fujiwara S Tags: Acta Derm Venereol Source Type: research

Fibrodysplasia ossificans progressiva: diagnosis in primary care
OBJETIVO: Buscou-se demonstrar ser possível diagnosticar a fibrodisplasia ossificante progressiva na atenção primária à saúde. DESCRIÇÃO DO CASO: Paciente de dez anos que, desde os quatro anos, mostrava rigidez progressiva nas articulações e na coluna vertebral, além de ossificações de partes moles, muitas vezes associadas a traumatismos. Havia desvio de hálux valgo dos primeiros artelhos de ambos os pés, presente desde o nascimento. Por meio de radiografias, demonstrou-se a presença de ossificações heterotópicas. COMENTÁRIOS: É possível realizar o diagnóstico desta doença com recursos disponíveis ...
Source: Revista Paulista de Pediatria - April 26, 2013 Category: Pediatrics Source Type: research

Imaging diagnosis: fibrodysplasia ossificans progressiva in a cat
A 1‐year‐old female cat was presented for progressive alopecia, gait abnormalities, and stiffness. Radiography demonstrated multiple calcified lesions within the soft tissues of the cervical and thoracic spine, shoulder, and limbs. Postmortem computed tomography provided more detailed information on the distribution, pattern, and extension of lesions. In addition, computed tomography helped guide sample selection for histopathology. The final diagnosis was fibrodysplasia ossificans progressiva. This is a rare disorder of unknown etiology, characterized by fibrosis and heterotopic bone formation in connective tissues. T...
Source: Veterinary Radiology and Ultrasound - April 11, 2013 Category: Veterinary Research Authors: Andrea Klang, Sibylle Kneissl, Romana Glänzel, Andrea Fuchs‐Baumgartinger Tags: Imaging Diagnosis Source Type: research

Fibrodysplasia ossificans progressiva (FOP): Report of a case with extra-articular ankylosis of the mandible
This report outlines the management of a patient with FOP limited to the maxillofacial region where the FOP lesion produced a fusion between the mandibular ramus and the zygomatic complex and trismus. The patient underwent three surgical procedures and various medical treatments during a 19-year period in attempts to manage the trismus, all in vain. The initial difficulty in establishing the diagnosis and ignorance of the true nature of the disease led to unsuccessful surgery. (Source: Journal of Cranio-Maxillofacial Surgery)
Source: Journal of Cranio-Maxillofacial Surgery - March 18, 2013 Category: ENT & OMF Authors: R.K. Kriegbaum, S. Hillerup Source Type: research

Fibrodysplasia ossificans progressiva (FOP): A disorder of extraskeletal endochondral ossification
Fibrodysplasia ossificans progressiva (FOP) is a genetic disorder in which extraskeletal bone forms in soft connective tissues, initiating during childhood and continuing throughout adult life. This heterotopic bone is qualitatively normal and forms through endochondral ossification. Episodes of bone formation often occur in response to injury. In addition to heterotopic ossification, FOP is associated with altered skeletal development, the most characteristic of which is malformation of the great toes. All FOP patients that we have examined carry mutations in ACVR1, the gene encoding the ALK2 BMP type I receptor. Most pat...
Source: Seminars in Arthritis and Rheumatism - February 11, 2013 Category: Rheumatology Authors: Eileen M. Shore Tags: Conference Proceedings Source Type: research