Nickan Research Institute Immunopathologia Persa 2423-8015 4 1 2018 01 01 Psoriasis with polymyositis; a rare combination of two autoimmune diseases e01 10.15171/ipp.2018.01 EN Fayaz Sofi Ashaq Parrey Mushtaq Ahmad Bilal Ahmad Journal Article 10.15171/ipp.2018.01 2017 03 20 2017 05 04 Psoriasis with polymyositis although both are autoimmune diseases, they have rarely been reported together. Psoriasis is a papulosquamous skin disease with erythematous papules or plaques and silvery scales. Polymyositis is an autoimmune disease with inflammatory myopathy affecting predominantly proximal muscles. We report a case of psoriasis with steroid resistant polymyositis.