The method of presacral pneumoretroperitoneum for rendering not only the kidneys and suprarenals radioapparent, as descriptionbed by Rivas, but also the liver and spleen, as observed by us, and the method of splenovenography introduced by Dreyer and Budtz-Olsen for demonstrating the function of the spleen and the patency of the splenic vein, prompted us to combine these two methods in the radiological investigation of splenomegaly. Since the first case to be examined by these methods proved to be a non-parasitic false traumatic cyst of the spleen with infection and adhesions, and as it was so clearly demonstrated radiologically, diagnosed pre-operatively and confirmed pathologically, we felt that it was of sufficient clinical interest to warrant publication together with a review of the literature.
1. 1,500 Faecal specimens have been treated by the Zinc Sulphate Centrifugal Flotation technique and by the Centrifugal Sedimentation method in a series of parallel investigations. 2. The tabulated results show that for the detection of helminth ova, Faust's process is not as efficient as the originator claims. 3. Evidence has been produced to prove that the sedimentation test is far superior to the flotation procedure for demonstrating the presence of worm ova in stools. 4. Both processes are useful for concentrating protozoal cysts, but flotation is somewhat better than sedimentation for this purpose. 5. If Faust's technique be employed, it should be supplemented by an examination of the washed deposit, or by the ASE process.