**Question:** All are true about Wilm's tumor, EXCEPT:

A. Wilm's tumor is a type of pediatric renal cancer.
B. It occurs more frequently in males than females.
C. It is caused by genetic mutations involving the VHL gene.
D. Treatment typically involves surgery and radiation therapy.

**Core Concept:** Wilm's tumor is a type of pediatric renal cancer that primarily affects children. It is characterized by the uncontrolled growth of nephron-primordial cells in the kidneys, leading to the formation of a tumor.

**Why the Correct Answer is Right:** Wilm's tumor is indeed a type of pediatric renal cancer, but stating it occurs more frequently in males is not entirely accurate. It does have a slightly higher incidence in males, but the difference is minimal and not significant enough to be considered an exception.

**Why Each Wrong Option is Incorrect:**

A. While Wilm's tumor is a type of pediatric renal cancer, saying it is not caused by genetic mutations involving the VHL gene is incorrect. The VHL gene plays a crucial role in the development of Wilm's tumor, particularly when a mutation in the gene occurs. This gene is responsible for regulating the body's response to oxygen levels and is involved in the development of renal cell carcinoma, including Wilm's tumor.

B. Although Wilm's tumor is more common in males, stating that it occurs more frequently in females is incorrect. The disease is indeed more common in males, with a male-to-female ratio of about 3:2.

C. Wilm's tumor is associated with genetic mutations involving the VHL gene, as explained above. Therefore, stating that it is not caused by genetic mutations involving the VHL gene is incorrect.

D. Wilm's tumor treatment typically involves a combination of surgery and radiation therapy as well as chemotherapy. Thus, stating that it involves only surgery and radiation therapy is incorrect, as chemotherapy plays a crucial role in the treatment regimen.

**Clinical Pearl:** Wilm's tumor is a rare but potentially life-threatening kidney tumor in children. Its association with genetic mutations involving the VHL gene highlights the importance of genetic counseling and screening for at-risk individuals. The correct treatment involves a combination of surgery, radiation therapy, and chemotherapy for optimal patient outcomes.