raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:337

Fibrodysplasia ossificans progressiva

Synonyms: FOP · Myositis ossificans progressiva · Stone man syndrome

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant, Not applicable
Age of onset
Childhood
Status
active

Fibrodysplasia ossificans progressiva (FOP) is a severely disabling heritable disorder of connective tissue characterized by congenital malformations of the great toes and progressive heterotopic ossification that forms qualitatively normal bone in characteristic extraskeletal sites.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enFibrodysplasia ossificans progressivaFOP · Myositis ossificans progressiva · Stone man syndrome
frFibrodysplasie ossifiante progressiveFOP · Maladie de l'homme de pierre · Myosite ossifiante progressive
deFibrodysplasia ossificans progressivaFOP · Myositis ossificans progressiva · Münchmeyer-Syndrom
esFibrodisplasia osificante progresivaEnfermedad del hombre de piedra · Miositis osificante progresiva
itFibrodisplasia ossificante progressivaFOP · Malattia dell'uomo di pietra · Miosite ossificante progressiva
nlProgressieve ossificerende fibrodysplasieFibrodysplasia ossificans progressiva (FOP) · Myositis ossificans progressiva · Stenen man syndroom
ptFibrodisplasia ossificante progressivaFOP · Miosite ossificante progressiva
plPostępujące kostniejące zapalenie mięśniCzłowiek z kamienia · FOP
csFibrodysplasia ossificans progressivaFOP · Myositis ossificans progressiva · Nemoc zkamenělých lidí
ukПрогресуюча фібродисплазія кісткової тканиниFOP · Прогресуючий міозит кісток · Синдром камяної людини
zh进行性骨化性纤维发育不全进行性骨化性肌炎
trFibrodisplazi ossifikans progressivaFOP · Taş adam sendromu · Miyozit ossificans progressiva

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM135100Evalidated
ICD-10M61.1Especificvalidated
ICD-11FB31.1Especificvalidated
MONDO0007606Evalidated
MeSHD009221Evalidated
UMLSC0016037Evalidated
GARD6445Evalidated
MedDRA10068715Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (8):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
ACVR1Disease-causing germline mutation(s) (gain of function) inAssessedHGNC:171ENSG000001151701025762q24.1activin A receptor type 123011467[PMID]
5

Prevalence and incidence

7 records
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 0000.05 / 100 000WorldwideValue and classValidated22133093[PMID]_[EXPERT]
Point prevalence<1 / 1 000 0000.061 / 100 000United KingdomValue and classValidated7069743[PMID]
Prevalence at birth<1 / 1 000 0000.087 / 100 000SpainValue and classValidated22796417[PMID]
Point prevalence<1 / 1 000 0000.036 / 100 000SpainValue and classValidated22796417[PMID]
Point prevalence<1 / 1 000 0000.078 / 100 000EuropeValue and classValidatedORPHANET_22796417[PMID]_28666455[PMID]_7069743[PMID]
Point prevalence1-9 / 1 000 0000.136 / 100 000FranceValue and classValidated28666455[PMID]
Point prevalence<1 / 1 000 0000.085 / 100 000United StatesValue and classValidated34353327[PMID]

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

35 annotations · validated 2024-04-29
HPOTerm (as annotated by Orphanet)Diagnostic
Obligate (100%)
HP:0011986Ectopic ossification
Very frequent (99-80%)
HP:0001844Abnormal hallux morphology
HP:0003468Abnormal vertebral morphology
HP:0010054Abnormality of the first metatarsal bone
HP:0011989Ectopic ossification in ligament tissue
HP:0011987Ectopic ossification in muscle tissue
HP:0002949Fused cervical vertebrae
HP:0001376Limitation of joint mobility
HP:0030431Osteochondroma
HP:0010109Short hallux
HP:0003306Spinal rigidity
HP:0001482Subcutaneous nodule
Frequent (79-30%)
HP:0003367Abnormal femoral neck morphology
HP:0001172Abnormal thumb morphology
HP:0001596Alopecia
HP:0010058Aplasia/Hypoplasia of the phalanges of the hallux
HP:0030084Clinodactyly
HP:0000365Hearing impairment
HP:0001385Hip dysplasia
HP:0030838Hip pain
HP:0002659Increased susceptibility to fractures
HP:0002093Respiratory insufficiency
HP:0002650Scoliosis
Occasional (29-5%)
HP:0002625Deep venous thrombosis
HP:0030038Enchondroma
HP:0001508Failure to thrive
HP:0001822Hallux valgus
HP:0001004Lymphedema
HP:0000787Nephrolithiasis
HP:0100240Synostosis of joints
Very rare (<4-1%)
HP:0001903Anemia
HP:0002750Delayed skeletal maturation
HP:0000501Glaucoma
HP:0001249Intellectual disability
HP:0001250Seizure

Run the differential on the 12 obligate / very frequent terms

Annotation source: 32525643[PMID]_29445932[PMID]

7

Sources for this card