The imaging appearances of hydatid disease at some unusual sites.

On reviewing our cases of hydatid disease seen over a period of 20 years (1978-1998), we encountered a number of unusual radiological appearances and sites, which are demonstrated in this pictorial review. We briefly discuss the pathology of hydatid disease and its complications.

Rectocolonic calcification due to schistosomiasis. A clinicoradiologic study.

Four patients who had intravenous pyelography were found to have radiologically visible calcification of the rectocolon and urinary tract due to schistosomiasis. All four patients had mild proctocolitis colonoscopically and multiple calcified schistosomal ova were found in the submucosa histologically. The authors believe that radiologically visible rectocolonic calcification is more common than reported and that it is associated with a clinically mild or latent form of schistosomiasis.