What is a bezoar?

A bezoar is best described as a mass that forms in the stomach or intestines, typically created when ingested material, such as hair, food, or other indigestible substances, accumulates and hardens. Bezoars can obstruct the digestive tract and lead to various gastrointestinal problems, emphasizing their relevance in medical terminology and practice.

While the other options describe various medical conditions or entities, they do not accurately capture the characteristics or formation of a bezoar. Distinctly, it is not a type of tumor, a digestive enzyme, or a parasitic infection; rather, it specifically refers to an accumulation of material within the gastrointestinal system, making the selection of "a mass in the stomach" the most appropriate answer. Understanding bezoars contributes to recognizing potential complications in digestive health and underscores the importance of awareness in clinical settings.