Which among the following is not true regarding nasopharyngeal carcinoma –
**Core Concept**
Nasopharyngeal carcinoma (NPC) is a type of cancer that originates in the nasopharynx, the upper part of the throat behind the nose. It is a rare but aggressive cancer with distinct epidemiological and pathological characteristics.
**Why the Correct Answer is Right**
NPC is strongly associated with Epstein-Barr virus (EBV) infection, particularly the EBV-encoded oncogene LMP1. EBV-positive NPC tends to occur in non-endemic regions, such as Southeast Asia and North Africa, whereas EBV-negative NPC is more common in endemic regions, like southern China. The clinical presentation of NPC often includes nasal obstruction, hearing loss, and neck masses.
**Why Each Wrong Option is Incorrect**
**Option A:** Nasopharyngeal carcinoma is strongly associated with EBV infection, making this statement true.
**Option B:** NPC is a type of cancer that primarily affects the epithelial cells lining the nasopharynx, making this statement true.
**Option C:** NPC has a strong genetic predisposition, particularly in families with a history of the disease, making this statement true.
**Clinical Pearl / High-Yield Fact**
NPC is a "silent killer" due to its non-specific symptoms, which can lead to delayed diagnosis. A high index of suspicion and thorough clinical examination are essential for early detection and treatment.
**Correct Answer: C. NPC has a strong genetic predisposition.