Invisible Active Bleeding Due to the Watershed Phenomenon.

A case is presented of an 83-year-old female patient with a strong suspicion of active bleeding, but no diagnostic contrast blush could be seen on the original computed tomography (CT) scan. When performing CT angiography in veno-arterial extracorporeal membrane oxygenation (VA-ECMO), it is important to understand the altered haemodynamics, as flow-related artefacts such as the vascular watershed phenomenon can obscure bleeding.

Caseous Calcification of the Mitral Valve.

Caseous calcification of the mitral annulus is a benign mass-like lesion which can mimic cardiac tumor or abscess; therefore, multimodal imaging should be considered, avoiding unnecessary interventions.

Small Bowel Volvulus Complicated by Bowel Infarction.

Torsion of a segment of the small bowel and its mesentery, together with closed loop obstruction and absent enhancement of paper-thin small bowel walls, is an alarm sign for small bowel volvulus complicated by acute bowel infarction.