Converging Inflammations: Simultaneous Myositis and Polyneuropathy as a Diagnostic Challenge

Idiopathic inflammatory myopathies consist of a variety of autoimmune diseases with variable clinical manifestations, treatment response, and prognosis. Symmetrical proximal predominant muscle weakness is the usual presenting clinical manifestation except in the case of clinically amyopathic dermatomyositis and inclusion body myositis, which represent without muscle weakness and asymmetric muscle weakness, respectively. Other extramuscular manifestations include skin rash and necrosis, arthritis, interstitial lung disease, myocarditis, dysphagia, and Raynaud's phenomenon. However, there are only a few case reports of neuromyositis in the literature. Here, we describe a case of a 30-year-old Indian male patient with polymyositis associated with inflammatory polyneuropathy.