What is the medical specialist who treats diseases of the digestive system?

• A. Gastroenterologist
• B. Endoscope
• C. Upper endoscopy
• D. Colonoscopy

Answer: (A)

A gastroenterologist is the physician who specializes in diseases of the digestive system. This field covers the entire gastrointestinal tract—from the esophagus through the stomach and intestines—and includes related organs like the liver, pancreas, and gallbladder. A gastroenterologist diagnoses and treats a wide range of conditions such as GERD, ulcers, inflammatory bowel disease, hepatitis, and pancreatitis, and they often perform procedures to examine the GI tract. The other choices refer to a tool or procedures: an endoscope is the instrument used to look inside, while upper endoscopy and colonoscopy are the procedures themselves. They are not people, so they don’t describe the medical specialist.