Metacarpal pseudoepiphysis Abnormal 5th metacarpal epiphysis morphology Pseudoepiphysis of the 5th metacarpal 2009-07-02T04:13:20Z HP:0010227 UMLS:C4023957 The normal epiphysis of the fifth metacarpal is localized at the distal end of the metacarpal bone. This term applies if an accessory epiphysis, located at the proximal end of the metacarpal bone, is present.