TY - JOUR T1 - Giant Cell Tumor of the Thoracic Spine Simulating Mediastinal Neoplasm JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 1723 LP - 1726 VL - 20 IS - 9 AU - Hideyuki Sakurai AU - Norio Mitsuhashi AU - Kazushige Hayakawa AU - Hideo Niibe Y1 - 1999/10/01 UR - http://www.ajnr.org/content/20/9/1723.abstract N2 - Summary: A case of giant cell tumor of the thoracic spine simulating mediastinal neoplasm was identified on plain films, CT scans, MR images, and with scintigraphy. CT showed a hypervascular soft-tissue mass with shell-like calcification in the right upper mediastinum. MR imaging showed a collapse of the T1 vertebral body and a mass extending to the mediastinum. The mass had a low signal on T1-weighted MR images and a predominantly high signal on T2-weighted images with heterogeneity. Technetium-99m methylene diphosphonate bone scintigraphy showed intense uptake in both the T1 and marginal parts of the mediastinal mass. There was no accumulation of gallium-67 citrate, but 18-fluorine fluorodeoxyglucose positron emission tomography showed marked uptake. The variation in these imaging findings played an important role in the differential diagnosis of this uncommon mediastinal mass. ER -