Computed tomography colonography compared with conventional colonoscopy for the detection of colorectal polyps.

Objective: To determine the diagnostic accuracy of computed tomography colonography (CTC) compared with conventional colonoscopy (CC).

Methods: Patients with an indication of CC were included. Fifty patients underwent CTC using multidetector CT before diagnostic colonoscopy was performed by an expert colonoscopist.

Relapsing upper bleeding in non-Hodgkin's oesophageal lymphoma associated with achalasia.

Achalasia is a disease of unknown origin in which there is a denervation of the myenteric plexus on the smooth muscle of the lower oesophageal sphincter, causing a cardial stenosis and a loss of efficacy of oesophageal peristalsis. The predominant symptoms are dysphagia for solids and liquids and regurgitation of the retained food. Occasionally, there may be oesophageal haemorrhage as a consequence of oesophagitis and stasis ulcers.