title: Ectopic lacrimal gland of the orbit.
abstract: A case of intraorbital ectopic lacrimal gland was evaluated with various radionuclides. CT and MRI with contrast enhancement showed a soft-tissue mass in the orbit. The lesion was gallium-avid, but 18F-FDG PET demonstrated very faint uptake. On early and delayed 201Tl-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 marked uptake in the lesion, was useful for the differential diagnosis between intraorbital malignancy and this benign lesion. These scintigraphic variations played an important role in the tissue characterization of this uncommon lesion.
authors.affiliation: Department of Radiology and Radiation Oncology, Gunma University School of Medicine, Maebashi, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Sakurai
authors.forename: N
authors.initials: N
authors.lastname: Mitsuhashi
authors.forename: K
authors.initials: K
authors.lastname: Hayakawa
authors.forename: M
authors.initials: M
authors.lastname: Nozaki
authors.forename: H
authors.initials: H
authors.lastname: Kurosaki
authors.forename: S
authors.initials: S
authors.lastname: Kishi
authors.forename: T
authors.initials: T
authors.lastname: Joshita
authors.forename: H
authors.initials: H
authors.lastname: Niibe
mesh_terms: D002648:Child; D003847:Deoxyglucose / Q000031:analogs & derivatives; D003937:Diagnosis, Differential; D005462:Fluorine Radioisotopes; D019788:Fluorodeoxyglucose F18; D005710:Gallium Radioisotopes; D006801:Humans; D007765:Lacrimal Apparatus / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D008297:Male; D009918:Orbital Neoplasms / Q000000981:diagnostic imaging; D019275:Radiopharmaceuticals; D013670:Sodium Pertechnetate Tc 99m; D014055:Tomography, Emission-Computed; D015899:Tomography, Emission-Computed, Single-Photon
chemical_list: D005462:Fluorine Radioisotopes; D005710:Gallium Radioisotopes; D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18; D003847:Deoxyglucose; D013670:Sodium Pertechnetate Tc 99m