[Oxyphil adenoma with granular cells (oncocytoma) of the caruncle].

The histological appearance of an oncocytoma of the caruncle is reported, and the authors review the principle ocular sites for this rare and inusual tumour. They discuss the various hypotheses which have been advanced on the subject of their origin, particularly following ultrastructural findings which show chiefly a multiplication in the number of mitochondria which explains the granular appearance of the oncocytes on light microscopy.