Abdominal pain and fever in a patient with human immunodeficiency virus: a case report

Neutropenic enterocolitis (NE), or typhlitis, a condition typically associated with severe neutropenia in the setting of chemotherapy, is highly morbid (50-100%) and benefits from early diagnosis. It has been associated with neutropenia in the setting of human immunodeficiency virus (HIV) but has not been described in a patient with HIV who was not neutropenic on presentation. We present the case of a patient with HIV who was not neutropenic on presentation but found to have NE.

A 27-year-old male with a history of HIV on antiretroviral therapy and epilepsy presented with concern for breakthrough seizure. The patient revealed he was having non-bloody, non-bilious emesis and diarrhea for 3 days. Initial labs were white blood cell count 3.9 × 10⁹/L, absolute neutrophil count (ANC) 3.14 × 10⁹/L, CD4 count 290 cells/mm³, and undetectable viral load. A computed tomography (CT) scan of the abdomen/pelvis with contrast revealed wall thickening of the cecum and proximal ascending colon (Fig. 1), suggestive of NE. The patient was started on cefepime and metronidazole but switched to piperacillin/tazobactam after he became leukopenic/neutropenic.

Neutropenic enterocolitis, typically presenting with fever, abdominal pain, and hematochezia, can be difficult to identify, particularly in patients without a history of malignancy. However, it should be considered in patients with HIV presenting with these symptoms, even with a normal ANC and CD4 count above 200 cells/mm³. Prompt diagnosis can be made with CT, and early initiation of broad-spectrum antibiotics greatly reduces the risk of morbidity/mortality.