Pediatric Renal Tumors: Updates in the Molecular Era

Area of Science:

• Pediatric Oncology
• Molecular Pathology
• Genitourinary Pathology

Background:

• Pediatric renal tumors are a heterogeneous group of cancers requiring precise molecular classification.
• Understanding the underlying genetic drivers is crucial for accurate diagnosis and targeted therapy.

Purpose of the Study:

• To review recent molecular characterizations of key pediatric renal tumor subtypes.
• To highlight the clinical implications of these molecular findings for diagnosis, classification, and treatment.

Main Methods:

• Review of current literature on molecular alterations in pediatric renal tumors.
• Integration of genetic findings with established tumor classifications.

Main Results:

• Association of pediatric cystic nephromas with DICER1 tumor syndrome.
• Identification of somatic BRAF mutations in the metanephric family of tumors.
• Characterization of ETV6-NTRK3-negative congenital mesoblastic nephromas.
• Expanded spectrum of gene fusions in translocation renal cell carcinoma.
• Relationship of clear cell sarcoma of the kidney with BCOR-altered tumors.
• Elucidation of SMARCB1 alterations in rhabdoid tumors of the kidney.

Conclusions:

• Molecular characterization is transforming the understanding and management of pediatric renal tumors.
• Specific genetic alterations provide new diagnostic markers and therapeutic targets.
• Continued research into the molecular landscape will further refine treatment strategies.