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Coronal section of right kidney ('bi-valved') with relatively circumscribed, firm, pale tan to grey tumour, 68 x 48 x 48mm, in the mid cortex. The tumour distorts the capsule but does not breach it and does not involve the perinephric fat.
The tumour is relatively undifferentiated and was initially labelled a 'malignant spindled cell tumour' favouring metastatic melanoma (given the strong family history).