Case report: cystic partially differentiated nephroblastoma (Wilms tumor)

Area of Science:

• Pediatric Oncology
• Pathology
• Nephrology

Background:

• Cystic partially differentiated nephroblastoma is a recently identified clinicopathologic entity.
• It arises from the metanephric blastema, distinct from renal dysplasia.
• This tumor combines nephroblastoma elements with cystic disease.

Observation:

• A case involving a 2-month-old newborn with this rare tumor is presented.
• The tumor exhibited cystic features with partially differentiated renal elements in cyst septa.
• Aggressive cellular morphology was noted, suggesting potential malignancy.

Findings:

• The newborn was treated with combined chemotherapy following surgical removal of the tumor.
• Histopathological analysis distinguished it from multilocular cysts by specific renal elements.
• The aggressive cellular appearance guided the treatment approach.

Implications:

• This case highlights the importance of recognizing and appropriately treating cystic partially differentiated nephroblastoma.
• Early diagnosis and combined therapy may be crucial for managing this potentially malignant pediatric tumor.
• Further research into the pathogenesis and optimal treatment strategies for this entity is warranted.