Originally published by Harvard Health. What Is It? The prostate is a walnut-sized gland that sits below the bladder in...

Originally published by Harvard Health. What Is It? Chronic sinusitis is a long-term inflammation of the sinuses. The sinuses are...

Originally published by Harvard Health. What Is It? No body organ performs a wider variety of essential jobs than the...

Originally published by Harvard Health. What Is It? Cluster headaches are very intense headaches. They usually start in the area...

Originally published by Harvard Health. What Is It? Cogan's syndrome is a rare, rheumatic disease characterized by inflammation of the...

Originally published by Harvard Health. What Is It? When a bone breaks or cracks, the injury is called a fracture....

Originally published by Harvard Health. What Is It? Colon polyps are growths of tissue inside the large intestine, also called the...

Originally published by Harvard Health. What Is It? Colorectal cancer is an uncontrolled growth of abnormal cells in the colon...

Originally published by Harvard Health. What Is It? Coma is a deep and prolonged state of unconsciousness resulting from disease,...

Originally published by Harvard Health. What Is It? The common cold, also called viral rhinitis, is one of the most...