An Unexpected Bond: Unraveling a Case of Spleno-Gonadal Fusion Anomaly Mistaken for Lymph Node and Testicular Tumor

A 10-year-old's para-testicular "tumors" turned out to be ectopic splenic tissue — a rare anomaly that can prevent unnecessary surgery if recognized

Journal: Pediatric and Developmental Pathology | Published: 2025-11-17 | Type: Case Report, Review | PMID: 41246951 Authors: Kaur J, Nambiyar K, Chandrasekaran SK, Kar R, Kumar M, Jindal B — Jawaharlal Institute of Postgraduate Medical Education and Research, Pondicherry, India Funding/COI: No funding listed; authors declare no conflicts of interest

Summary

A 10-year-old boy presenting with an empty left scrotum underwent diagnostic laparoscopy confirming cryptorchidism, but the surgeon also found two discrete masses near the left testicle and spermatic cord — raising immediate suspicion for a para-testicular tumor. Histopathology showed both masses were ectopic splenic tissue, diagnosing spleno-gonadal fusion (SGF), a rare congenital anomaly in which splenic tissue abnormally fuses with the gonad during fetal development. The takeaway is blunt: if clinicians don't know this entity exists, a child gets an unnecessary orchiectomy.

Claims

• SGF presents in continuous form (splenic tissue physically connected to the spleen) or discontinuous form (isolated splenic tissue near the gonad, no connection to the main spleen) — this case appears to be discontinuous
• Two discrete peri-gonadal masses were present alongside confirmed cryptorchidism in the same patient
• Pre-operative diagnosis was not achieved; histopathology was required for definitive identification
• The authors assert that awareness of SGF can prevent misdiagnosis and avoid unnecessary surgical removal of testicular or para-testicular tissue

Study Quality

Single case report — the floor of the evidence hierarchy. No controls, no comparative data, no statistics, and no outcome follow-up beyond the diagnostic moment. That's not a flaw for this study type; case reports exist to document rare entities and are evaluated by how clearly they make their clinical point. This one has a clean structure: presentation, laparoscopic findings, histopathological confirmation, diagnostic conclusion.

The "review" component is presumably a narrative survey of prior case reports on SGF, not a systematic review. The abstract gives no detail on search methodology, inclusion criteria, or how many cases exist in the literature — so its comprehensiveness cannot be assessed.

Red Flags

• One patient at one institution; zero generalizability by definition
• No pre-operative imaging interpretation described — unclear whether ultrasound or MRI was performed and, if so, why it didn't suggest the diagnosis
• Narrative literature review with no described methodology — could be cherry-picked, incomplete, or both
• No follow-up data reported; patient outcomes after diagnosis are unknown
• Publication bias heavily shapes what case reports get published — instructive, unusual cases make it to print; unremarkable ones don't

Strengths

• The clinical teaching point is concrete and high-stakes: missing SGF means unnecessary surgery on a child's reproductive anatomy
• Histopathological confirmation is documented — the diagnosis is not speculative
• No conflicts of interest
• Combines the case with a literature contextualization, giving clinicians a single reference point for a rare entity
• Pediatric and developmental pathology is the appropriate venue — this reaches the audience that needs it

Verdict

Case reports earn their place by doing one thing: documenting a rare pattern that could harm a patient if a clinician never encountered it. This one clears that bar. A pediatric surgeon who has never heard of SGF might send a 10-year-old to the OR for tumor resection or orchiectomy. That's a preventable outcome. The science here is minimal — it's a single observation dressed in clinical language — but the clinical message is legitimate and the histopathological diagnosis appears solid. This paper is worth five minutes of a pediatric urologist's or pathologist's time, and worth nothing to anyone looking for population-level evidence.