Evaluation of Wilm's tumor begins with a history and physical examination.

Physical findings in someone with Wilm's tumor include:

• Abdominal mass
• Absence of the iris in one eye
• High blood pressure
• One side of the body appears larger than the other

Tests are necessary to make the diagnosis of Wilm's tumor.

Tests that may be used to evaluate Wilm's tumor include:

• Complete blood count
• Kidney profile
• Urinalysis
• Urinalysis
• Abdominal CT scanning:
• Usually shows a mass originating from the kidney. This is the single best imaging test for diagnosing this condition.
• Abdominal ultrasound
• IVP
• May show a distortion of the kidney outline