Splenogonadal Fusion: Pathogenesis and Clinical Implications

Splenogonadal fusion is a rare congenital anomaly occurring during early embryogenesis when abnormal adhesion or migration of developing splenic and gonadal tissues leads to ectopic splenic tissue alongside or within the gonad. Two morphological variants are recognised: continuous, where a fibrous or splenic cord links the orthotopic spleen to the gonad, and discontinuous, characterised by isolated splenic nodules adherent to the gonad. Clinically, this condition often presents in childhood or adolescence as scrotal swelling, inguinal hernia or cryptorchidism, and is frequently misidentified as a testicular mass. Such misdiagnosis can result in unnecessary orchiectomy, with attendant impacts on fertility and hormonal function. Recent advances in imaging—including multimodal ultrasonography, Doppler flow studies, elastography and magnetic resonance imaging—have enhanced preoperative differentiation between benign ectopic splenic tissue and malignant tumours. Surgical management now emphasises organ-sparing techniques: intraoperative frozen section analysis and laparoscopic orchiopexy can preserve testicular viability. Recognition of associated congenital anomalies and potential neoplastic risk in undescended gonads underscores the necessity for multidisciplinary approaches to improve diagnostic accuracy and long-term reproductive health.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Splenogonadal Fusion: Pathogenesis and Clinical Implications publication trend

The graph below shows the total number of articles in splenogonadal fusion: pathogenesis and clinical implications across all publications each year (not limited to Nature Index journals).

Technical terms

Splenogonadal fusion (SGF): A congenital anomaly in which splenic tissue is abnormally attached to the gonad or its derivatives.

Cryptorchidism: Failure of one or both testes to descend into the scrotum.

Continuous type: SGF form where a cord of splenic or fibrous tissue connects the orthotopic spleen to the gonad.

Discontinuous type: SGF form with ectopic splenic nodules adherent to the gonad without direct connection to the spleen.

Orchiectomy: Surgical removal of one or both testes.

Orchiopexy: A surgical procedure to mobilise and fix an undescended testis within the scrotum; the Fowler-Stephen variant involves staged ligation of the testicular vessels to enhance mobilization.

References

1. Splenogonadal Fusion Diagnosed by Doppler Ultrasonography. The Scientific World JOURNAL (2004).
2. Seminoma arising in splenogonadal fusion: a case report and literature review. Diagnostic Pathology (2023).
3. Splenogonadal fusion: a case report and review of the literature. BMC Urology (2021).
4. Pathogenesis, Diagnosis, and Management of Splenogonadal Fusion: A Literature Review. Case Reports in Urology (2020).
5. Splenogonadal fusion- a great clinical masquerader: a case report and review of literature. Egyptian Journal of Radiology and Nuclear Medicine (2023).