비전형적 수근관 증후군: 정중신경 신경다발의 선별 손상으로 인한 수근관 증후군과 수근관 증후군에 동반된 정중신경의 회귀운동신경병증

초록

Carpal tunnel syndrome (CTS) being the most common entrapment neuropathy makes physicians to easily overlook CTS variants. Here we report two cases of atypical carpal tunnel syndromes which were correctly diagnosed with precise electrodiagnostic findings. One patient seemed moderate to severe degree of CTS at first, but careful electrodiagnostic analysis proved predominant involvement of fascicles of motor nerve and sensory fibers to the thumb, which are located in the radial side of the median nerve. Sonographic findings and MRI demonstrated a mass arising from the median nerve compressing the radial side of the nerve at the wrist. Another patient at a glimpse seemed as mild degree of CTS, but deliberate analysis of electrodiagnostic findings showed separate severe neuropathy of recurrent motor branch of the median nerve. Surgical findings proved these findings and the patient received appropriate surgical treatment, leading to complete resolution of symptoms. Precise analysis of electrodiagnostic findings helped physicians to correctly diagnose these atypical CTS and lead to proper management.

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