FAMILIAL FINGER CONTRACTURE AND ASSOCIATED FAMILIAL KNEE-JOINT SUBLUXATION

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Abstract
Congenital finger contracture occurs both as an isolated condition and as a familial one, although the latter is less frequent. In recent years, at least, no family group has been described, that presents this abnormality. Most of our knowledge on the subject of the familial type is based on observations on single or few members of one family. In the group described here, contracture has been frequent. A large number of those having the defect have been examined, and data concerning most of the remaining ones have been secured. The cause of congenital finger contracture has never been determined. The pathologic change underlying the contracture has long been a subject of dispute. The deformity has been attributed to flexor spasm, extensor paralysis, shortening of the volar skin, paralysis of the lumbrical and interossei muscles, shortening of the digital and palmar fascias, and shortening of the joint capsules. Neuhoff,1in

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