Wilms' Tumor

The factors for determining the prognosis and long-term survival of children with Wilms’ tumor include the following:
• Histology, favorable or unfavorable
• The extent of the disease
• Age and overall health of the child at diagnosis
• Size of the primary tumor
• Response to therapy
• Child's tolerance to specific medications, procedures or therapies

Preoperative tumor rupture may result in an altered prognosis.

Most often, the first symptom of a Wilms’ tumor is a swelling or a large lump in the abdomen. Parents may notice swelling or hardness in the abdomen while bathing or dressing the child.

It's usually not painful, but it might be in some children.