Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan.
Mod Rheumatol Case Rep. 2024 Jul 8;8(2):391-393. doi: 10.1093/mrcr/rxad073.
Snapping of fingers can be caused by pathologies such as stenosing flexor tenosynovitis. However, snapping symptoms in the metacarpophalangeal (MP) joint caused by hypertension and hyperplasia of the lateral band are rare. We present a 26-year-old female with symptoms of painful snapping of the middle finger. When the finger was actively flexed from the hyperextension of the MP joint, the ulnar lateral band was prominent, and a snapping phenomenon occurred. The cause of the snapping finger was considered to be tightness of the ulnar lateral band, and surgery was planned. Intraoperatively, the ulnar lateral band was tense and hyperplastic. The snapping phenomenon disappeared immediately after the resection of the lateral band. It is important to consider this condition as one of the differential diagnoses of snapping finger when the patient complains of an atypical snapping phenomenon.
弹指可由狭窄性屈肌腱腱鞘炎等病变引起。然而，由高血压和外侧束增生引起的掌指（MP）关节弹响症状较为罕见。我们介绍一位 26 岁女性，其中指出现疼痛性弹响症状。当手指从 MP 关节的过伸位主动屈曲时，尺侧侧副带突出，并出现弹响现象。考虑弹响手指的原因是尺侧侧副带紧张和增生，计划进行手术。术中发现尺侧侧副带紧张且增生。切除侧副带后，弹响现象立即消失。当患者出现非典型弹响时，应将这种情况作为弹响手指的鉴别诊断之一。
