Abnormal triangular epiphysis causing angular XXXX .

@entity1 @entity6276 @entity85
PURPOSE: To present a triangular-shaped abnormal secondary ossification center of the distal phalanx causing angular @entity6276 and the surgical outcome of corrective closing-wedge osteotomy for this deformity. METHODS: We treated 6 @entity1 with abnormal triangular epiphysis in the distal phalanx of the thumb, including 3 bilateral cases. The average age was 43 months and there were 2 @entity1 and 4 @entity1 . Of the 9 thumbs intraepiphyseal closing-wedge osteotomy was performed in 5 and proximal phalangeal closing-wedge osteotomy was performed in 4. We measured the deformities in degrees of angulation and the range of motion of the interphalangeal (IP) joint. The average duration of the follow-up period was 27 months after the surgery. RESULTS: @entity85 of ulnar deviation averaged 30 degrees , which was reduced to an average of 12 degrees after osteotomy at the last follow-up assessment. All osteotomies healed and there was no evidence of physeal or articular damage. Interphalangeal joint range of motion did not decrease after surgery in all cases. @entity1 and parents were satisfied with the results of the surgery, although @entity85 persisted in the interphalangeal joint when in the flexed position after proximal phalangeal osteotomy. CONCLUSIONS: Abnormal triangular epiphysis causing angled thumb is different from delta bone and can be treated with either intraepiphyseal or proximal phalangeal closing-wedge osteotomy. The intraepiphyseal procedure, however, could achieve @entity85 correction regardless of the interphalangeal joint position. TYPE OF STUDY/LEVEL OF EVIDENCE: Therapeutic, Level IV.
