This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': "All are true about Wilm's tumor, EXCEPT: \nSelect and explain. \nA. Present at 5 years of age, B. Can be bilateral, C. Presents as abdominal mass, D. Diploid tumors have better prognosis", 'role': 'user'}, {'content': "Answer: A \nExplanation: 80% of children with Wilm's tumor present present under 5 years of age. The mean age of diagnosis is 3 years. 6% of patients with Wilm's tumor have bilateral disease. Bilateral disease is more common in familial type. Clinical features: Most patients presents with an abdominal mass, others can present with hematuria, hypeension, abdominal pain, fever, anorexia and vomiting. Prognostic factors: Prognostic factors are staging, pathology and ploidy. Diploid tumors a better prognosis than hyperdiploid tumors. Ref: Essential paediatrics by O P Ghai, 6th edn, page 574-5", 'role': 'assistant'}]