[Parotid cystadenolymphomas : histo-enzymological and ultrastructural study in 6 cases (author's transl)].

Histo-enzymological and ultrastructural studies in 6 cases of cystadenolymphoma were able to confirm the marked metabolic activity of the oncocytic cells, which from the major part of these tumours. The oncocytes demonstrate greatly enhanced enzymatic activity, particularly of those enzymes concerned with oxydative metabolism and the diaphorases. Electron microscopy of the oncocytes shows that they are filled with mitochondria of very varied size and form, sometimes associated with the presence of several intracytoplasmic crystalloids. The second, lymphoplasmocytic component of these tumours present no particular morphological features.