Figure 11.

Atypical carcinoid tumour. 46-year-old female with chronic diarrhoea, flushing, cardiac arrhythmia and high levels of urinary 5-HIAA. (a) Multidetector CT images demonstrate a circumferential thickening of the last ileal loop with sparing of the outer wall layers, (b) some mucosal irregularities can be identified on the retrograde view from virtual endoscopic reconstruction. (c) Caudal sections show marked fluid distension of ileal and jejunal loops owing to carcinoid-induced secretory discharge.