Internal medicine is a medical specialty that deals with diagnosis of broad range of diseases affecting internal organs, prevention and medical treatment of adults.
Subspecialties of internal medicine include Allergy and Immunology, Cardiology (heart diseases), Endocrinology (hormone disorders), Hematology (blood disorders), Infectious Diseases, Gastroenterology (diseases of the gut), Nephrology (kidney diseases), Oncology (cancer), Pulmonology (lung disorders), and Rheumatology (arthritis and musculoskeletal disorders).