MUSCULAR LESION IN CHRONIC POLYMYOSITIS.
D001706:Biopsy; D002648:Child; D003937:Diagnosis, Differential; D004576:Electromyography; D006801:Humans; D009132:Muscles; D009136:Muscular Dystrophies; D009220:Myositis; D010336:Pathology; D017285:Polymyositis
BIOPSY; CHILD; DIAGNOSIS, DIFFERENTIAL; ELECTROMYOGRAPHY; MUSCULAR DYSTROPHY; MYOSITIS; PATHOLOGY