FIGURE 4. Unsuspected metastatic disease in 61-y-old woman with known recurrent colon carcinoma and negative CT for metastases. DHC ¹⁸F-FDG study was performed for staging before surgery. In addition to local recurrence in right abdomen (arrow), 2 other sites of uptake were detected, suggesting lymph node metastases (arrowhead). Latter diagnosis was confirmed on histologic examination.

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