Papillary "tumours" of the left ventricle.

We report here a unique case of intraventricular polyps of the left ventricle, which appear on gross and histological examination to be identical with papillary tumours of the heart valves. The case is of unusual interest in that the results of histochemical studies are consistent with the view of elaborated by that such tumours" are not neo- plasms or hamartomas but may be giant Lambl's excrescences.