Reverse Kirner's Deformity: Case Report

Congenital Dorsally Curving Deformity of the Distal Phalanx of the Little Finger: Case Report

“…We found only 2 reports describing a distal phalanx of the little finger with curvature in the dorsal direction, referred to as a reverse Kirner's deformity. 6,7 Regarding the deformity of the little finger, the present case had the same characteristic features as those described by previous authors in terms of age, affected finger, appearance of nail deformity, and direction of the deformity. Song and Koh 9 reported that, even though some individuals were born with Kirner's deformity (early onset type), in the majority of cases, the onset of the deformity ranged from 7 to 15 years (late onset type).…”

“…1,2 Radiographs reveal distortion and widening of the physeal plate, along with curvature of the diaphysis of the distal phalanx. 1 Although several articles [2][3][4][5] have been published on palmar curvature of the distal phalanx, to our knowledge, only 2 authors 6,7 have previously reported a deformity of the distal phalanx with a curvature in the dorsal direction; Moss and Papanastasiou 7 described it as a ski jump deformity of the distal phalanx, and Lau and Tonkin 6 considered their case to be a reverse Kirner's deformity.…”

Radiographic features of Kirner's deformity

“…The differences between epiphyseal line or diaphysis curvature and distal tip curvature in terms of age were significant both in the present study and survey of literature ( anova : P = 0.0003, Tukey–Krammer test: P < 0.05). Furthermore, three fingers demonstrated reversed Kirner's deformity with dorsal flexion and not volar flexion of the distal phalanx (Moss and Papanastasiou ; Lau and Tonkin ; Iwasaki et al. ).…”