Answer of December 2002

Clinical History:

M/71. Sudden onset of low back pain.

                Figure 1. Non-contrast CT

                        Figure 1. Contrast CT

Diagnosis:

Acute Diverticulitis involving Descending Colon. No abscess formation is present

Discussion:

Figure 1: Noncontrast CT Thorax shows dense crescent-shaped rims in ascending and descending thoracic aorta.

Figure 2: Postcontrast CT Thorax shows no significant enhancement in crescent-shaped rims. No intimal flap is demonstrated.