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Fig. 5 | Cancer Imaging

Fig. 5

From: How We Read Oncologic FDG PET/CT

Fig. 5

This patient had suspicion of pelvic recurrence in the setting of prior surgical excision for rectal carcinoma. There was intense uptake in the known pre-sacral soft tissue thickening (a) and (c) (red arrow) with SUVmax of 11. The linear morphology on the coronal image (b) suggested this was more likely inflammatory than malignant. A separate linear tract of metabolic activity was also seen (green arrow) extending from the pre-sacral abnormality to the peri-anal region (not shown). All abnormalities resolved following antiobiotic therapy confirming inflammatory aetiology

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