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Follow-up MR imaging of PI-RADS 3 and PI-RADS 4 prostate lesions.
Clinical Imaging 2017 May
OBJECTIVE: To determine the rate of malignancy after follow-up MR imaging of the prostate in PI-RADS 3 lesions without core biopsy and PI-RADS 4 lesions after negative initial core biopsy.
MATERIALS AND METHODS: We performed follow-up MRI in 46/72 (64%) patients with PI-RADS 3 lesions and 26/72 (36%) patients with PI-RADS 4 lesions in baseline MRI.
RESULTS: The rate of malignancy in PI-RADS 3 lesions was 4% (2/46) and in PI-RADS 4 lesions 69% (18/26).
CONCLUSIONS: Follow-up MRI for PI-RADS 3 lesions should be performed. For PI-RADS 4 lesions with initial negative biopsy we recommend an instant repeat core biopsy.
MATERIALS AND METHODS: We performed follow-up MRI in 46/72 (64%) patients with PI-RADS 3 lesions and 26/72 (36%) patients with PI-RADS 4 lesions in baseline MRI.
RESULTS: The rate of malignancy in PI-RADS 3 lesions was 4% (2/46) and in PI-RADS 4 lesions 69% (18/26).
CONCLUSIONS: Follow-up MRI for PI-RADS 3 lesions should be performed. For PI-RADS 4 lesions with initial negative biopsy we recommend an instant repeat core biopsy.
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