Fig. 3
From: Giant cell tumour of the tendon sheath of the spine: clinical features and imaging findings
A 47-year-old female with malignant GCTTS. PET/CT maximum intensity projection (MIP) images revealed increased but heterogeneous uptake of FDG in the C4-6 vertebra (A, arrow), and no other lesions were found in any part of the body. The spinal lesion shows heterogeneous FDG uptake with central deficiency (B, D, long arrow) but higher uptake in the periphery (B, D, short arrow), with an SUVmax value of 8.9. CT showed irregular osteolytic bone destruction (C, arrow). CT-guided biopsy was performed on the hypermetabolic area of the lesion (E). The lesion showed signal hypointensity on sagittal T1WI image with unclear margin (F, short and long arrows) and hyperintensity in the central region but hypointensity in the periphery on coronal T2WI images (G, short and long arrows)