Splenogonadal fusion: A rare paratesticular lesion and how to recognise it on ultrasound

Introduction Splenogonadal fusion is a rare developmental disorder that results in a gonadal or paragonadal mass due to the close proximity of the developing spleen and gonad. Case report We describe a case of splenogonadal fusion presenting as a paratesticular mass in a 25-year-old male. This was ultimately diagnosed on surgical biopsy. Discussion Splenogonadal fusion is a rare abnormality but can be managed conservatively. The sonographic features and the differential diagnosis are highlighted. Conclusion Through this case, we highlight the clinical and sonographic features of splenogonadal fusion. Awareness amongst ultrasound practitioners is important, given that it can be managed conservatively, and means of a non-invasive diagnosis are highlighted.