Suspected Local Recurrence after Radical Prostatectomy: Endorectal Coil MR Imaging

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Abstract
PURPOSE: To evaluate endorectal coil magnetic resonance (MR) imaging in the depiction of local recurrence after radical prostatectomy. MATERIALS AND METHODS: Endorectal MR images were reviewed retrospectively in 82 patients who underwent prostatectomy. The interval between prostatectomy and MR imaging ranged between 0.5 and 13.0 years (mean, 3.25 years). Local recurrence was considered present if there was no evidence of distant metastases and there was a positive biopsy result, subsequent reduction in prostate-specific antigen (PSA) level after radiation therapy of the pelvis, or serial MR imaging findings of increased tumor size. Local recurrence on MR images was assessed for location, size, signal intensity, and invasion of adjacent structures. All images were reviewed independently by two readers who were blinded to clinical information. RESULTS: Thirty-four of 82 patients did not meet inclusion criteria. Forty-one of 48 remaining patients had clinically documented local recurrence, which MR imaging d...

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