Clean FRCS notes with inline figures
Fibrodysplasia ossificans progressiva is an extremely rare connective tissue disease
•Caused by mutation affecting body’s repair mechanism, causing fibrous tissue (muscles, tendons, ligaments) to be ossified spontaneously or when damaged
•Deformed big toe for unknown reason
•+ very stiff joints
•Median survival ~ 40
•No cure
•Most are spontaneous mutation
•Involves mutation of the ACVR1 gene (activin A type I receptor gene, a BMP type-1 receptor)
•AD allele on chromosome 2q23-24
•Variable expression, complete penetrance
•(Evelyn: wont appear in exam again)
Wiki:
•attempts to surgically remove bone in a FOP patient may result in explosive growth of new bone


