Recurrent focal myositis in a patient on maintenance hemodialysis

Abstract

Focal myositis is a benign inflammatory process involving a single group of muscles. It may resolve with conservative measures or may be a harbinger for polymyositis. Very few focal myosites are recurrent, and recurrence in patients with end-stage renal disease on hemodialysis is extremely rare. Clinical examination, electromyography, and magnetic resonance imaging help in identifying this entity. Muscle biopsy and histopathological evaluation are mandatory in diagnosis. It often responds to conservative treatment with anti-inflammatory drugs and physiotherapy, but occasionally it requires therapy with steroids. 局部肌炎是一種良性炎症，涉及單一肌肉組，可能會自行消失，亦可能是多發性肌炎的前身。局部肌炎的復發相當少見，在正在接受血液透析的末期腎病患者間更是極為罕見，其辨認一般透過臨床檢查、肌電學分析、及磁振造影，確診則必須透過肌肉活檢及病理組織檢驗達成。局部肌炎患者通常對物理治療及抗發炎藥物反應良好，僅在少數時候需要接受類固醇治療。