Clinical Significance of Renal Tissue in Neonatal Sacrococcygeal Teratoma: A Case Report With Review of Literature.
Alessio Conte, Silvia Rebella, Gabriele Gaggero et al.
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Case in brief
A neonate with a sacrococcygeal teratoma (SCT) had renal differentiation within the tumor, including a minor component interpreted as nephroblastoma. The authors reviewed newborn cases with renal tissue identified in SCTs: among 19 patients, renal tissue was classified as immature or ectopic nephrogenic tissue in 15 and as Wilms tumor in 4. All underwent surgical resection; some also received chemotherapy or radiotherapy. At a median follow-up of 29.5 months (range, 4-154), there were no cancer-related deaths.
What made this case unusual
The diagnostic challenge was distinguishing immature nephrogenic tissue from true nephroblastoma within an SCT; accepted criteria for classifying this renal differentiation are lacking.
Diagnostic / clinical pearl
Renal tissue in an SCT should be assessed carefully: immature nephrogenic tissue and Wilms tumor may be difficult to distinguish, so interpretation and management warrant multidisciplinary consideration.