• espiratory diseases: Such as asthma, pneumonia, chronic obstructive pulmonary disease (COPD), and water accumulation in the pleura 
• Digestive diseases: Such as diseases of the stomach, liver, pancreas, and gallbladder 
• Cardiovascular diseases: Such as acute coronary syndromes, congestive heart failure, valvular heart disease, atrial fibrillation, and hypertension 
• Blood diseases: Such as anemia, high cholesterol, and triglycerides 
• Other diseases: Such as kidney diseases, diabetes, thyroid diseases, rheumatic diseases, and hormonal disorders 

Internal medicine also includes oncology, which is the branch of internal medicine that focuses on diagnosing and treating cancers. Surgical oncologists and radiation oncologists may physically remove cancers or destroy them with radiation, while medical oncologists may administer chemotherapy and other medications.