Vol. 43 (1): 127-133, January – February, 2017

doi: 10.1590/S1677-5538.IBJU.2016.0252


Rajadoss Muthukrishna Pandian 1, Nirmal Thampi John 1, Anu Eapen 2, B. Antonisamy 3, Antony Devasia 1, Nitin Kekre 1

1 Department of Urology, Christian Medical College and Hospital, Vellore, Tamil Nadu, India; 2 Department of Radiology, Christian Medical College and Hospital, Vellore, Tamil Nadu, India; 3 Department of Biostatistics, Christian Medical College and Hospital, Tamil Nadu, India


Objectives: To study the usefulness of MRI in preoperative evaluation of PFUDD. Can MRI provide additional information on urethral distraction defect (UDD) and cause of erectile dysfunction (ED)?

Materials and Methods: In this prospective study, consecutive male patients presenting with PFUDD were included from Feb 2011 till Dec 2012. Those with traumatic spinal cord injury and pre-existing ED were excluded. Patients were assessed using IIEF questionnaire, retrograde urethrogram and micturating cystourethrogram (RGU+MCU) and MRI pelvis. Primary end point was erectile function and secondary end point was surgical outcome.

Results: Twenty patients were included in this study. Fourteen patients (70%) were ≤40years; fifteen patients (75%) had ED, seven patients (35%) had severe ED. MRI findings associated with ED were longer median UDD (23mm vs. 15mm, p=0.07), cavernosal injury (100%, p=0.53), rectal injury (100%, p=0.53), retropubic scarring (60%, p=0.62) and prostatic displacement (60%, p=0.99). Twelve patients (60%) had a good surgical outcome, five (25%) had an acceptable outcome, three (15%) had a poor outcome.

Poor surgical outcome was associated with rectal injury (66.7%, p=0.08), cavernosal injury (25%, p=0.19), retropubic scarring (18.1%, p=0.99) and prostatic displacement (16.7%, p=0.99). Five patients with normal erections had good surgical outcome. Three patients with ED had poor outcome (20%, p=0.20).

Conclusions: MRI did not offer significant advantage over MCU in the subgroup of men with normal erections. Cavernosal injury noted on MRI strongly correlated with ED.

Role of MRI may be limited to the subgroup with ED or an inconclusive MCU.

Keywords: Surveys and Questionnaires; Pelvis; Magnetic Resonance Imaging; Erectile Dysfunction

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