Partial duplication of the distal phalanx of the thumb. Depending on the severity, the appearance on x-ray can vary from a notched phalanx (the duplicated bone is almost completely fused with the phalanx) to a partially fused appearance of the two bones.
Bifid proximal phalanx of the thumb
Complete duplication of distal phalanx of the thumb
Partial duplication of the distal phalanx of the 2nd finger
Partial duplication of the distal phalanx of the 3rd finger
Partial duplication of the distal phalanx of the 4th finger
Partial duplication of the distal phalanx of the 5th finger
Synonyms
Exact Synonyms:
Bifid distal phalanx of thumb
;
Bifid terminal phalanges of thumbs
;
Bifid thumb distal phalanx
;
Incipient distal thumb phalanx duplication
;
Notched outermost bone of the thumb
;
Notched outermost bone of thumb
;
Notched terminal thumb phalanx