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Radiographic features of Kirner's deformity
Hiroshi Satake1, Toshihiko Ogino, Jun Eto
1Department of Orthopaedic Surgery, Yamagata University Faculty of Medicine, 2-2-2 Iida-Nishi,Yamagata, Japan. hsatake@med.id.yamagata-u.ac.jp
Congenital Anomalies
|June 12, 2013
Summary
This study details Kirner's deformity, classifying it by curvature site and noting significant age differences between types. Radiographic analysis revealed key features like distal phalanx angle and subluxation.
Area of Science:
- Orthopedics
- Radiology
- Pediatric Orthopedics
Background:
- Kirner's deformity is a rare congenital condition affecting the distal phalanx.
- Understanding its radiographic features is crucial for diagnosis and management.
Purpose of the Study:
- To investigate the radiologic features of Kirner's deformity.
- To explore potential causes and classify the deformity based on curvature site.
Main Methods:
- A retrospective study of 67 patients (41 in the series, 26 from literature).
- Classification into three types: epiphyseal line, diaphysis, and distal tip curvature.
- Radiographic analysis of 34 hands, including measurements of distal phalanx angle and assessment for subluxation.
Main Results:
- Kirner's deformity was more prevalent in females (26 vs. 12 males).
- Distal tip curvature was observed in older patients (mean age 26.5 years) compared to epiphyseal line (11 years) and diaphysis (12.4 years) curvatures.
- Dorsal subluxation of the distal phalanx occurred in 18% of hands.
Conclusions:
- Kirner's deformity exhibits distinct radiographic patterns based on curvature location.
- Age at presentation significantly differs between the epiphyseal line/diaphysis types and the distal tip type.
- Further research into the etiology of Kirner's deformity is warranted.
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