Trichobezoar is –
**Core Concept**
A trichobezoar is a type of **bezoar**, which is a mass found in the **gastrointestinal tract**. It is composed of swallowed **hair**, which accumulates and fails to pass through the digestive system. This condition is often associated with **trichophagia**, a compulsive eating of hair.
**Why the Correct Answer is Right**
The correct answer is related to the definition of a trichobezoar, which is a **hairball** that forms in the stomach. This occurs when a person ingests a large amount of hair, and it accumulates in the stomach, failing to pass through the digestive system. Over time, the hair becomes matted and forms a large ball.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not relate to the composition of a trichobezoar.
**Option B:** This option is also incorrect as it does not describe a trichobezoar.
**Option D:** This option is incorrect because it is unrelated to the definition of a trichobezoar.
**Clinical Pearl / High-Yield Fact**
Trichobezoars can cause **gastrointestinal obstruction** and **weight loss**. They are often associated with **psychiatric disorders**, such as trichotillomania.
**Correct Answer:** D. A mass of swallowed hair.