<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing disturbance of memory, a hip lump or mass, symptoms of the face, and stiffness all over my body. What could be wrong with me?  <response>: You might have Multiple Myeloma, a cancer of the plasma cells in the bone marrow that is causing these symptoms. We need to run some tests to confirm the diagnosis and start appropriate treatment. 