..Starting node ..Broad proximal phalanx of the thumb (HP:0009630)
Term ID:
9630
Name:
Broad proximal phalanx of the thumb
Synonym:
Broad innermost thumb bone
Definition:
Increased width of the proximal phalanx of the thumb. In contrast to the proximal phalanges of the digits 2-5, the proximal phalanx of the thumb is embryologically equivalent to the middle phalanges of the other digits, whereas the first metacarpal is embryologically of phalangeal origin and as such equivalent to the proximal phalanges of the other digits.