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Oncocytoma of the Lacrimal Gland

Schneeberg A. E., Lieb W.,
Bayerische Julius-Maximilians-Universität Würzburg, Universitäts-Augenklinik (Würzburg)

Introduction: Space-occupying lesions of the lacrimal gland can be devided into epithelial tumors and nonepithelial tumors including oncocytoma which is an exceedingly rare tumor of the lacrimal gland.
Case report: A 47-year-old patient presented with a subdermal, painless tumor of the left lacrimal gland. Axial computed tomography of the orbit showed a 10x10 mm lesion in the lacrimal gland with soft tissue density and without calcifications or bony destruction.
Results: A reddish, flesh-coloured tumor measuring 10x8x6 mm was removed by anterior orbitotomy. Histologically the lesion presented as solitary, well-defined masses with a thin fibrous capsule. Oncocytes formed solid trabeculae and without mitotic activity. Immunostaining showed distinct activity of AE1/AE3 with coexpression of Vimentin and weak staining of S100 protein. Histological findings led to the diagnosis of oncocytoma.
Conclusions:
Oncocytomas are rare neoplasms and are mostly found in salivary glands. In ocular adnexa oncocytic lesions mostly occur in the caruncle (3,75-10% of caruncular tumors), in the lacrimal gland they are exceedingly rare. Oncocytic tumors are almost always benign, and due to the slow growth in lacrimal gland oncocytomas rarely cause clinical symptoms. In literature exist only few reports of malignant oncocytomas but because of frequent recurrences a complete surgical removal is the therapy of choice.

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