ECTOPIC LACRIMAL GLAND OF THE ORBIT

A case of intraorbital ectopic lacrimal gland was evaluated with vario us radionuclides. CT and MRI with contrast enhancement showed a soft-t issue mass in the orbit. The lesion was gallium-avid, but F-18-FDG PET demonstrated very faint uptake. On early and delayed Tl-201-Cl images , mildly increased uptake and mild retention were observed. Technetium -99m-(V)-DMSA SPECT showed intense accumulation on both the early and delayed images. Technetium-99m-pertechnetate SPECT, demonstrating mark ed uptake in the lesion, was useful for the differential diagnosis bet ween intraorbital malignancy and this benign lesion. These scintigraph ic variations played an important role in the tissue characterization of this uncommon lesion.