<prompt> A known HIV infected patient presents with a non-tender parotid gland swelling. The most likely diagnosis is:B-cell non-Hodgkins lymphomaLymphoepithelial cystsSialectasiaParotid abscess  <response>: Benign lymphoepithelial cysts may develop in the parotid glands on one or both sides. They arise from intraparotid lymph nodes. Diagnosis is confirmed on CT scan and fine-needle aspiration cytology. 