Lymphatic drainage of lateral wall of nose –
**Core Concept**
The lymphatic drainage of the nasal cavity is complex, involving multiple groups of lymph nodes. The **lymphatic vessels** of the nasal cavity ultimately drain into the **deep cervical lymph nodes**.
**Why the Correct Answer is Right**
The lateral wall of the nose, which includes the **turbinate bones** and **meatuses**, drains its lymphatic fluid primarily into the **retropharyngeal lymph nodes** and then into the **deep cervical lymph nodes**. This pathway is crucial for the drainage of the nasal cavity's lateral structures.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it does not specifically address the lateral wall's drainage.
**Option B:** Incorrect as it is not the primary route for lymphatic drainage of the lateral nasal wall.
**Option C:** Incorrect because, although the deep cervical nodes are involved, they are not the primary site for drainage of the lateral nasal wall.
**Clinical Pearl / High-Yield Fact**
Remember, the nasal cavity's lymphatic drainage is divided based on its anatomical structures, with the lateral wall having a distinct pathway.
**Correct Answer:** D. Retropharyngeal lymph nodes.