Neglected congenital trigger thumb.

We present a case of neglected trigger thumb in a forty-year-old male. The patient presented to our clinic due to bilateral triggering of his fourth digit. He attested to having pain and limitation of joint movement of his left thumb since his childhood in the former Soviet Union, with occasional triggering. This eventually subsided and the thumb became stuck in relative flexion and could not be fully extended. We performed X-rays of both thumbs wherein the left affected thumb interphalangeal joint showed an aberrant configuration and sclerosis of both joint surfaces. The joint surface curvature was altered on the left side and contact area reduced. This presentation of altered thumb interphalangeal joint biomechanics following an untreated congenital trigger thumb further emphasizes the need for surgical intervention when indicated.