A solid pediatric renal mass with potential hemorrhage is most consistent with which diagnosis?

A solid pediatric renal mass with potential hemorrhage is most consistent with which diagnosis?

• A. Renal cell carcinoma
• B. Angiomyolipoma
• C. Wilms tumor
• D. Neuroblastoma

Answer: (C)

Wilms tumor is the classic pediatric renal mass. It arises within the kidney and tends to present as a solitary, solid intrarenal mass in young children. Hemorrhage and necrosis can occur inside the tumor, making the lesion appear heterogeneous on imaging. This combination—kid, solid intrarenal mass, and potential internal bleeding—fits Wilms tumor best. Other entities are less typical in this scenario: angiomyolipoma is usually benign and often contains macroscopic fat (helpful on imaging) and is less common in children; renal cell carcinoma is rare in pediatrics; neuroblastoma typically arises from the adrenal region or sympathetic chain and may present as an adrenal or extra-renal mass with different imaging features such as calcifications and midline crossing.

Wilms tumor is the classic pediatric renal mass. It arises within the kidney and tends to present as a solitary, solid intrarenal mass in young children. Hemorrhage and necrosis can occur inside the tumor, making the lesion appear heterogeneous on imaging. This combination—kid, solid intrarenal mass, and potential internal bleeding—fits Wilms tumor best.

Other entities are less typical in this scenario: angiomyolipoma is usually benign and often contains macroscopic fat (helpful on imaging) and is less common in children; renal cell carcinoma is rare in pediatrics; neuroblastoma typically arises from the adrenal region or sympathetic chain and may present as an adrenal or extra-renal mass with different imaging features such as calcifications and midline crossing.