Which of the following is not true for juvenile angiofibroma –
**Core Concept**
Juvenile angiofibroma is a benign vascular tumor that predominantly affects adolescent males, often presenting as a nasal mass. It is characterized by its rapid growth and potential for local destruction, necessitating prompt diagnosis and treatment.
**Why the Correct Answer is Right**
Juvenile angiofibroma typically arises in the nasopharynx, specifically in the region of the sphenopalatine foramen, and is known for its high vascularity, which can lead to significant bleeding during surgical intervention. The tumor is rich in vascular channels, including arteriovenous malformations, and contains a mixture of fibrous and vascular tissues.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because juvenile angiofibroma is indeed more common in adolescent males, with a male-to-female ratio of approximately 10:1.
* **Option B:** This option is incorrect because juvenile angiofibroma is typically benign, with a rare occurrence of malignant transformation.
* **Option C:** This option is incorrect because juvenile angiofibroma often presents with nasal obstruction, epistaxis, and sinusitis due to its location and growth pattern.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that juvenile angiofibroma is highly vascular, and preoperative embolization is often recommended to reduce the risk of significant bleeding during surgical excision.
**Correct Answer: B. Juvenile angiofibroma is malignant.**