A rheumatologist is an internist or pediatrician who received further training in the diagnosis (detection), and treatment of diseases that affect the muscles, bones, joints, ligaments, and tendons. These diseases can cause pain, swelling, stiffness, and potentially cause joint deformities General Surgery" is a discipline of surgery having a central core of knowledge embracing anatomy, physiology, metabolism, immunology, nutrition, pathology, wound healing, shock and resuscitation, intensive care, and neoplasia, which are common to all surgical specialties Osteoarthritis Rheumatoid arthritis (RA) Lupus. Spondyloarthropathies-ankylosing spondylitis (AS) and psoriatic arthritis (PsA) Sjogren's syndrome. Scleroderma.