A 29-year-old male with no previous medical or surgical history presented with right hip pain for 1-year duration. Physical examination showed right anterior hip joint tenderness. Imaging showed an ill-defined expansile lytic lesion of the right acetabulum centered in the posterior column and extends to involve the lower margin of the iliac bone causing complete osseous destruction (Figures 1-3 ). There is involvement of the acetabular articular surface. The lesion demonstrated locally aggressive radiological features and was suspicious of a malignant neoplasm. Whole-body FDG PET/CT scan demonstrated intensely increased tracer uptake (SUV max 12) at the site of the acetabular/ iliac lesion highly suggestive of malignancy. Otherwise, no abnormal uptake to suggest local or distant metastasis (Figures 4 ).