Unusual inguinal mass: Ectopic seminal vesicle.

A 28-year-old male was referred to our radiology department with the complaint of inguinal mass. He had this mass since its childhood but has recent discomfort. First of all ultrasound was performed and it showed tubular structures connecting with each other. Doppler Ultrasound showed no flow within the tubular mass. At first a thrombosed vascular malformation or lymphocele was considered in differential diagnosis. A scrotal MRI (magnetic resonance imaging) was requested by urology department for further characterization. No right seminal vesicle was seen in its anatomical position and left seminal vesicle is seen in the normal location on MRI (Panel A, axial T2 weighted image; Panel B, coronal T2 weighted image, arrow). There was a tubular cystic mass in right inguinal canal with the same intensity as left seminal vesicle on all sequences (Panel C, Axial T2 weighted image; Panel D, coronal T2 weighted image, arrow). The diagnosis of ectopic seminal vesicle was made. To the best of our knowledge there was no case in literature with an ectopic seminal vesicle. It can be a rare cause of inguinal mass and should be kept in differential diagnosis.