Possible False-Positive Metastatic Prostate Cancer on an In-111 Capromab Pendetide Scan as a Result of a Pelvic Kidney

Abstract
A 61-year-old man who had a radical prostatectomy for adenocarcinoma of the prostate 8 months before now had a Gleason score of 9 and a prostate-specific antigen level that had increased to 0.6 since the surgery. An In-111 capromab pendetide scan was ordered to determine the presence and extent of disease. SPECT images of the pelvis showed asymmetric uptake in the left posterior pelvis suggestive of metastatic disease in the left internal iliac nodes. Correlation with the preoperative CT images revealed a low-lying pelvic kidney in this location, which explained this worrisome appearance.

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