This document discusses three diseases: Hodgkin's disease, Kaposi's sarcoma, and sarcoidosis. Hodgkin's disease is a type of lymphoma that affects lymph nodes and can spread to other organs. Kaposi's sarcoma causes lesions on the skin or mucous membranes and can spread to the lungs, liver or intestines. Sarcoidosis is an inflammatory disease that causes granulomas, most often in the lungs or lymph nodes, and can affect multiple other organs. It discusses symptoms, diagnosis and treatment options for each disease.