Diabetes mellitus type I associated with dermatomyositis: an extraordinary rare case with a brief literature review.

Insulin dependent diabetes mellitus (IDDM) is considered to be an autoimmune disease. IDDM is associated with other autoimmune diseases such as rheumatoid arthritis, autoimmune thyroid disease, multiple sclerosis, ankylosing spondylitis, psoriasis and systemic lupus erythematosus. Dermatomyositis (DM) is a disease of autoimmune aetiology involving skin and skeletal muscles damaged by an inflammatory process dominated by lymphatic infiltration. The association of IDDM with DM is extraordinarily rare. To our best knowledge, to date only two reports-one of them referring to a patient in childhood-have been published worldwide. DM and IDDM affect children and young adults. Herein, a case of DM in association with IDDM in a 28-year-old man is presented.