MEDICAL DICTIONARY
Ectrodactyly: The congenital absence of all or part of one or more fingers or toes.
The term ectrodactyly has been applied to a variety of malformations of the fingers or toes. It is probably best reserved for: - transverse terminal aphalangia (absence of the last bone in the finger or toe),
- adactylia (total absence of a finger or toes), or
- acheiria (total absence of one or both hands).
Cases of ectrodactyly defined in this way are usually sporadic (with no family history of this malformation). As a rule, one hand is involved and the feet are not affected. Congenital constriction rings ("amniotic bands") are sometimes associated with the malformation.
The hereditary condition called split-hand/split-foot malformation and sometimes called lobster-claw deformity is also termed ectrodactyly, as does another hereditary disorder called the EEC syndrome. (EEC stands for ectrodactyly, ectodermal dysplasia , and facial cleft.)
The word ectrodactyly is derived from the Greek ektroma (abortion) and daktylos (finger) = literally, abortion (of a) finger.
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