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Congenital cystic dilatation of the intrahepatic bile ducts--Caroli's syndrome--is a rare disease of which about one hundred cases have been reported in the literature. Based on two observations, the value of various radiological procedures is discussed. Compared with other noninvasive procedures, computer tomography has the advantage of being able to show not only the changes in the liver, but also the changes in the liver, but also the medullary sponge kidney which often accompanies this condition. The indications for ERC can therefore be more strictly defined.

The computer tomographic appearances of space-occupying lesions in the renal pelvis in 15 patients are described, and the place of CT in the radiological diagnosis is discussed. The clinical symptoms of renal tumours are often not characteristic, and conventional radiological methods frequently produce nonspecific appearances. Computed tomography, which is non-invasive, is therefore a suitable method for diagnosing space-occupying lesions in the renal pelvis at an early stage. Prognosis depends greatly on extra-pelvic spread, which can be demonstrated by CT alone.

Computer tomography changes after retroperitoneal trauma are described on the basis of 19 patients seen by the authors. It appears that this method is superior to conventional techniques, both as a screening method and for carrying out follow-ups. The indications for angiography are thereby reduced.

To determine whether current concepts of myocardial organization were in fact the result of artifacts introduced by the dissection technique, a method comprising air injection of the coronary arteries (which gently separated the myocardial fibers) and computerized tomography was devised. Viewing the tomographs cinematographically confirmed the concept that the heart is formed by a double looping of myocardial fiber bands was correct. Examination of abnormal hearts, eg, one with Duchenne muscular dystrophy, shows that pathologic tissue disarrangements could also be identified.