Killian’s dehiscence is found outpouching of:
**Core Concept**
Killian's dehiscence is a congenital anomaly of the palatoglossal arch, which is a fibromuscular band connecting the palate to the tongue. It is a remnant of the embryonic palatoglossal fold and can be a source of nasal regurgitation of fluids.
**Why the Correct Answer is Right**
Killian's dehiscence is an outpouching of the nasopharynx through a weakness in the palatoglossal arch. This occurs due to incomplete closure of the palatoglossal fold during embryonic development. The palatoglossal arch is composed of the palatoglossus muscle and fibrous tissue, which normally separates the nasopharynx from the oropharynx.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not relate to Killian's dehiscence. The correct answer is related to the nasopharynx and the palatoglossal arch.
**Option B:** This option is incorrect as it is a different anatomical structure. The correct answer is specifically related to the nasopharynx and the palatoglossal arch.
**Option C:** This option is incorrect as it is a different anatomical structure. The correct answer is specifically related to the nasopharynx and the palatoglossal arch.
**Clinical Pearl / High-Yield Fact**
Killian's dehiscence is a rare congenital anomaly that can cause nasal regurgitation of fluids. It is often associated with other congenital anomalies of the palate and oropharynx.
**Correct Answer:** C.