[A case of successful treatment of angioma of the middle and external ear].

A rare form of benign tumour (angioma of the middle and external ear) is described. The preoperative treatment with the use of embolization of the feeding vessel made possible surgical intervention on a practically "dry" operating field.

[Defining the optimal conditions for immunoperoxidase cytochemistry at the submicroscopic level].

The authors tested a number of experimental protocols and chemicals known to facilitate permeabilization of tissues to immunoperoxidase markers without ultrastructural alterations of the cells to be examined. Monoclonal antibodies producing hybridoma lymphomas served as a primary test object. None of the procedures employed (i.