A 25-year-old homosexual man, not regular with treatment, presented with fever, rectal pain and intermittent haematochezia. He had been diagnosed with HIV/AIDS 1 year prior. Examination showed anal condylomas and non-tender inguinal lymphadenopathy. CD4 count was 74/µL. CT scan of abdomen and pelvis showed a small hypodense collection with peripheral enhancement in the left perirectal region, measuring 1.9×1.4×2.5 cm (figure 1A). A diagnosis of rectal abscess was made. Treatment was done with intravenous antibiotics. Patient’s symptoms improved after 7 days of treatment. Two months …