Ostensible oncocytoma of accessory lacrimal glands.

Benign oncocytomas of the accessory lacrimal glands can be found in the lacrimal caruncle, plica semilunaris or conjunctival fornices, but are extremely rare. A series of 15 supposed oncocytomas of the ocular adnexa was reviewed retrospectively, and histological differences were noted with respect to the parotid gland counterpart. Lesions could be divided into three histological groups: (1) tumours composed of tubules lined by tall columnar epithelium with finely granular cytoplasm; the tubules often had dilated lumens containing mucinous secretion; (2) cystic tumours with prominent epithelial tufts projecting from much of the cyst wall; (3) tumours with solid areas composed of variably cuboidal or polygonal cells, largely in trabecular arrangement, and co-existing with the previously described tubular and cystic elements. A striking resemblance to Warthin's tumour without a lymphocytic component, such as may affect the parotid salivary gland, was noted in several tumours.