Fig. 3

Selected Pelvic CT scans at variable periods interval which reveal normal pelvis CT scan without any suspicious lytic bony lesion (A, B, C). while in 2023 the scan showed an expansile, lobulated osteolytic destructive bony lesion in the left upper sacrum measuring about 5.8 × 6 × 6.2 cm in AP x CC x TS diameters respectively highly suspicious for serious malignant nature (D) (The arrow)