Craniodigital syndrome - intellectual deficit is characterised by syndactyly of the fingers and toes, characteristic facies (`startled' facial expression with a small pointed nose, micrognathia, long dark eyelashes and prominent eyebrows) and intellectual deficit.

Webbing or fusion of the fingers or toes, involving soft parts only or including bone structure. Bony fusions are referred to as \"bony\" syndactyly if the fusion occurs in a radio-ulnar axis. Fusions of bones of the fingers or toes in a proximo-distal axis are referred to as \"symphalangism\".