LEARNING OBJECTIVES: 1. To demonstrate the expected MR findings in patients following treatment for prostate cancer 2. To show imaging features consistent with recurrence of prostate cancer 3. To illustrate MR features of mimics of prostate cancer recurrence in the treated prostate. BACKGROUND: Rates of recurrence of prostate cancer vary between 5-35% and is usually detected as biochemical recurrence. In patients with rising PSA, MR is indicated to assess for evidence of local tumour and to help plan salvage therapy. We review post treatment MR findings in the prostate bed following prostatectomy, within the gland of patients who have received prostate preserving treatments such as external beam radiotherapy and brachytherapy, or focal therapies including cryotherapy, high intensity focused ultrasound and photodynamic therapy. CONCLUSION: Early detection and characterisation of localised disease recurrence is important for prognostication and treatment planning, however imaging can be challenging. Multi-parametric MR helps to distinguish disease from mimics of recurrence.

Post-treatment MRI of prostate cancer