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Rheumatology & Joint Diseases

Polymyositis with Myalgia

ICD-10 Code
M33.20_1

Inflammatory muscle disease causing muscle weakness and pain.

Clinical Presentation & Protocol

Patient Usually Complains Of

Patient presents with progressive proximal muscle weakness involving the pelvic and shoulder girdles, accompanied by persistent myalgia. Onset is insidious, characterized by difficulty rising from a chair, climbing stairs, and overhead reaching. Denies dysphagia, dyspnea, or skin rashes. Reports morning stiffness and generalized fatigue.

Clinical Examination Findings

Musculoskeletal exam reveals symmetric proximal muscle weakness (Grade 4/5). Tenderness to palpation noted in deltoids and quadriceps. No evidence of Gottronโ€™s papules or heliotrope rash. Deep tendon reflexes are preserved and symmetric. Gait is waddling. No joint swelling or synovitis.

Treatment Protocol

Initiate high-dose systemic corticosteroids (Prednisone 1mg/kg/day) with a planned tapering schedule. Consider steroid-sparing agents (Methotrexate or Azathioprine) for long-term management. Physical therapy referral for range-of-motion exercises and muscle strengthening. Baseline labs: CK, LDH, Aldolase, and inflammatory markers (ESR/CRP).

Detailed clinical guide coming soon.