Ischemic proctosigmoiditis mimmicking a colorectal tumor

A 91-year-old woman, with a medical history of atrial fibrillation, dyslipidaemia and arterial hypertension, presented to the emergency department due to constipation, abdominal pain and rectal bleeding. The physical examination was remarkable for mild abdominal tenderness. The vital signs were stable. Laboratory tests showed anaemia (hemoglobin 10.1 g/ dL) and elevated CRP (73mg/dL) without leukocytosis. Abdominal computed tomography (CT) scan showed a concentric and irregular thickening of the rectosigmoid transition with densification of the adjacent fat, and a proximal dilated bowel segment, suggestive of a neoplasia (Fig. 1).