Wilms Tumor and Neuroblastoma

The gross specimen of the kidney shown above reveals a large, well-demarcated mass. This appearance is most characteristic of which of the following pediatric renal tumors?

A 4-year-old boy presents with a unilateral abdominal mass and hematuria. Imaging confirms a Wilms tumor without metastases (Stage III). After nephron-sparing surgery and staging, he is enrolled in a multimodal chemotherapy protocol. Which drug is the cornerstone of the first-line regimen for Wilms tumor?

Regarding the genetic and syndromic associations of Wilms tumor, all of the following are true EXCEPT:

A 2-year-old girl is found to have a firm, fixed, right-sided abdominal mass on examination. Ultrasound shows a heterogeneous suprarenal mass with calcifications. The child is asymptomatic with normal blood pressure. Which investigation is most appropriate to confirm the diagnosis of neuroblastoma and assess for metastatic disease?

Which of the following is the most common site of metastasis in neuroblastoma at diagnosis?