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Thallium-201 single-photon emission computed tomography in the detection of retroperitoneal schwannoma

Departments of ¹ Radiology and ² Orthopaedic Surgery, School of Medicine, Keio University, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan

View larger version (98K): [in a new window]   Figure 1. MRI of the pelvis in a patient with retroperitoneal schwannoma. (a) Axial T2 weighted MR images show a paraspinal mass spreading the spinal nerve foramen (arrowheads). (b) Coronal T2 weighted MRI shows a well-defined mass with low (Antoni A) and high (Antoni B) signal intensities (arrowheads).

View larger version (80K): [in a new window]   Figure 2. Planar 201Tl scintigraphy image. An area of increased uptake near the left sacroiliac joint is noted.

View larger version (46K): [in a new window]   Figure 3. 201Tl SPECT image of the pelvis. (a) Axial SPECT images show increased uptake site extending along the spinal nerve root (arrows), likely representing neurogenic tumour. (b) Coronal SPECT images show an elongated mass corresponding to the lesion on MRI.