part of part of has part has part characteristic of inheres in has modifier Abnormal metacarpal epiphysis morphology Abnormal 1st metacarpal morphology Abnormality of the epiphysis of the 1st metacarpal 2009-05-27T03:43:11Z HP:0010014 UMLS:C4024109 In contrast to the metacarpals 2-5, the first metacarpal is embryologically of phalangeal origin and as such equivalent to the proximal phalanges of the digits 2-5 (whereas the proximal phalanx of the thumb is equivalent to the middle phalanges of the other digits). The epiphysis of the first metacarpal is localized at the proximal end (as seen in the proximal phalanges of the other digits), whereas the epiphyses of the other metacarpal bones are located at the distal end. This term applies if the epiphysis of the 1st metacarpal is in any way abnormal, referring to age and gender depending norms, as seen on x-rays. Abnormality of the end part of the 1st long bone of hand Abnormality of the epiphyses of the proximal phalanges of the hand quality abnormal metacarpal bone of digit 1 epiphysis of first metacarpal bone