All of the following statements regarding primary effusion lymphoma are true, except:: (A) It generally presents in elderly patients, (B) There is often an association with HHV-8, (C) The proliferating cells are NK cells, (D) Patients are commonly HIV positive
Answer is C. Primary effusion lymphoma is an aggressive B cell lymphoma. The proliferating cells are B cells and not NK cells. All other features mentioned above are associated with primary effusion lymphoma. Ref: Harrison's Principles of Internal Medicine, 16th Edition, Pages 1121-22.