[Kirner's deformity. 4 case reports and review of the literature]

Kirner's disease is a rare deformity of the distal phalanx of the little finger, with a combination of camptodactyly and clinodactyly and clinodactyly. A review of the literature and analysis of our cases show that this anomaly appears to result from a unusual insertion of the deep flexor over the growth cartilage. No treatment is required in view of the absence of any clinical and functional symptoms.