Further evaluation of the findings was decided and a CT was performed.
What is the most likely diagnosis?
Most likely diagnosis is Sigmoid diverticulitis
CT findings are Sigmoid wall thickening, presence of a diverticulum and fluid collection in left paracolic sulci.
Diverticula are sac-like protrusions of mucosa through the colonic wall, along the natural openings created by intramural nutrient vessels. Due to higher intraluminal pressure, they are more frequently observed at the level of sigmoid colon.
CT with oral and intravenous contrast is considered the imaging modality of choice for assessing the disease and may reveal segmental thickening of the bowel, enhancement of the colonic wall, pericolic fat stranding, extravasation of air and fluid into the pelvis and peritoneal cavity, abscesses and signs associated to fistula formation.