Endoscopy indications include which of the following?

• A. Biopsy
• B. Laryngeal examination
• C. Blood tests
• D. Ultrasound of the abdomen

Answer: (A)

Endoscopy is used when you need to directly visualize the mucosal lining and often to obtain tissue for diagnosis. A biopsy during endoscopy provides a tissue sample that can be examined under a microscope to confirms conditions like cancer, infection, inflammation, or dysplasia. This makes biopsy the best-supported indication among the options: it directly leverages the endoscope’s ability to sample and diagnose mucosal disease.

Blood tests are laboratory tests on blood and do not require endoscopy. Ultrasound of the abdomen is an imaging study performed externally to the GI tract, not an endoscopic procedure. Laryngeal examination can be done with an endoscope, but in this context the primary diagnostic utility of endoscopy is the ability to biopsy and obtain tissue for histology.