As the name implies, MCT disease contains elements of several rheumatoid-collagen entities, including SLE, PSS, and dermatomyositis. Clinically, there is arthralgia or arthritis in 90%-95% of patients, Raynaud’s phenomenon in about 80%-90%, abnormal esophageal motility in about 70%, muscle pain in about 70%, and fever in about 30%. There is a low incidence of renal […]