Mycoplasma infection is a systemic vasculitis / neuritis, not only with pneumonia, but with various systemic symptoms and clinical course such as asthma, arthritis, nephritis, meningitis, encephalitis, pancreatitis, hepatitis, dermatitis . Symptoms and routine tests are often difficult to distinguish from rheumatic diseases, neurological and psychiatric diseases, blood diseases, chronic inflammatory diseases, and intractable immune diseases.