This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumour markers, Subject name: Pathology
[{'content': 'Which of the following markers are seen in Primary effusion lymphoma? \nSelect and explain. \nA. CD30, CD138, B. CD20, CD28, C. CD19, CD20, D. CD29, CD30', 'role': 'user'}, {'content': 'Answer: A \nExplanation: C030, CD138 Primary effusion lymphoma is a.k.a. Body cavity-based lymphoma It is caused by EBV+ Kaposi sarcoma virus (HHV-8). Mostly, seen in HIV-AIDS patients. Markers: The lymphoma cells usually express CD45 but lack pan-B-cell markers such as CD19, CD20, and CD79a. Activation and plasma cell-related markers and a variety of non-lineage associated antigens such as HLA-DR, CD30, CD38, VS38c, CD138, and EMA are often demonstrable.', 'role': 'assistant'}]