Partial duplication of the phalanges of the 4th finger Duplication of the proximal phalanx of the 4th finger Partial duplication of the proximal phalanx of the 4th finger 2009-05-26T02:20:37Z Partial duplication of the fourth proximal phalanx of hand, seen on x-rays as a broad and/or bifid phalanx. Partial duplication of the innermost bone of the ring finger UMLS:C4024129 HP:0009983 Partial duplication of the proximal phalanges of the hand