Condition where pulsatile tumor is found in external auditory meatus which bleed on touch –
**Core Concept**
Glomus tumors, also known as paragangliomas, are rare, benign neoplasms arising from the paraganglia cells in the temporal bone. These tumors are known to be highly vascular and can present with various symptoms depending on their location.
**Why the Correct Answer is Right**
Glomus tumors in the external auditory meatus (EAM) are a subtype of paragangliomas that can present with pulsatile bleeding due to their rich vascular supply. The tumor's presence in the EAM can cause symptoms such as pulsatile tinnitus, hearing loss, and vertigo. When touched or manipulated, the tumor can bleed due to its fragile vascular connections.
**Why Each Wrong Option is Incorrect**
**Option A:** Glomus tumors are not typically associated with the middle ear or mastoid process, making this option incorrect.
**Option B:** Hemangiomas are benign tumors composed of blood vessels, but they are not typically pulsatile or associated with the external auditory meatus.
**Option C:** Meningiomas are tumors arising from the meninges, but they are not typically found in the external auditory meatus or associated with pulsatile bleeding.
**Option D:** Schwannomas are benign tumors of the Schwann cells, but they are not typically associated with the external auditory meatus or pulsatile bleeding.
**Clinical Pearl / High-Yield Fact**
Glomus tumors in the external auditory meatus can be challenging to diagnose, and a high index of suspicion is required, especially in patients presenting with pulsatile tinnitus or bleeding from the ear.
**Correct Answer:** C. Glomus tumor.