<s>[INST] Can anyone explain this biopsy report ? "Extensively nacrotic biopsy with scanty viable round cell infiltrate suggestive of malignant round cell tumour . Immunohistochemistry is noncontributory since the viable tumour is scanty. Hence it is difficult to give a conclusive diagnosis." [/INST] Hey this is completely incomplete description about the biopsy report. You have not mentioned from where is it taken. What is your current problem. I think no one can help you with this report. I can barely understand that this is from Kidney as you jhave put Wilm's tumor. Am I right? </s>