## Core Concept
Primary effusion lymphoma (PEL) is a rare and aggressive subtype of non-Hodgkin lymphoma characterized by the presence of lymphoma cells in body cavities, most commonly the pleural, peritoneal, or pericardial space, without detectable tumor masses. It is strongly associated with **Kaposi's sarcoma-associated herpesvirus (KSHV)**, also known as human herpesvirus 8 (HHV-8). PEL usually occurs in immunocompromised individuals, particularly those with advanced HIV infection.

## Why the Correct Answer is Right
The correct answer, which is not provided in the query, relates to the characteristic features and associations of primary effusion lymphoma. Typically, PEL is noted for its association with KSHV, its presentation as serous effusions without solid tumor masses, and its poor prognosis. The details provided in the question options would directly relate to these characteristics.

## Why Each Wrong Option is Incorrect
Given that the specific details of the options (A, B, C, D) are not provided, a general approach to evaluating incorrect statements about PEL would involve:
- **Option A:** If a statement regarding PEL's association with KSHV or its typical presentation is incorrect, it would be wrong because PEL is indeed strongly associated with KSHV and characteristically presents as effusions.
- **Option B:** If a statement about the common sites of effusion or the immunocompromised state of patients is incorrect, it would be wrong because PEL commonly involves pleural, peritoneal, or pericardial spaces and occurs in immunocompromised individuals.
- **Option C:** Similar to options A and B, if a statement about clinical features, diagnostic criteria, or treatment outcomes is incorrect, it would be wrong based on established knowledge about PEL.
- **Option D:** As the correct answer is indicated to be option D, the statement it makes would contradict established facts about PEL.

## Clinical Pearl / High-Yield Fact
A key point to remember is that primary effusion lymphoma is **highly associated with KSHV (HHV-8)**, and this virus is detected in the lymphoma cells of virtually all cases. This association is critical for the diagnosis and understanding of the pathogenesis of PEL. Clinicians and pathologists should consider PEL in the differential diagnosis of lymphocytic effusions, particularly in immunocompromised patients.

## Correct Answer: D.