Table 1. Clinical timeline: a case of Fournier’s gangrene and hairy cell leukemia.

A chronological summary of the patient’s clinical course, including symptom onset, diagnostic milestones, surgical interventions, and final outcome. This timeline highlights the rapid progression of infection and the temporal relationship with the diagnosis and treatment of hairy cell leukemia.

ESBL: extended-spectrum beta-lactamase, HCL: hairy cell leukemia

Date	Event
Late February 2024	Initial onset of perianal pain and swelling
March 4, 2024	Surgical drainage of perianal abscess; ESBL-producing E. coli identified
March 8, 2024	Severe pancytopenia detected; bone marrow biopsy initiated
March 22, 2024	First dose of rituximab administered (HCL confirmed)
March 31, 2024	CT scan shows perirectal emphysema, abscess, and suspected rectal perforation
April 15, 2024	Surgery: colostomy, necrosectomy, and abdominal lavage
April 21, 2024	Patient died of septic shock despite ICU care