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Evaluation

Are you evaluating a carcinoma arising in the kidney?

Are most of the cells eosinophilic or pale?

Do some areas show a sarcomatoid component?

Do sections show alveolar, nested and/or sheetlike growth patterns?

Are binucleated or multinucleated cells relatively common?

Is the mitotic rate low in non-sarcomatoid areas?

Do cells show a zone of perinuclear clearing?

Does a Hale's colloidal iron show a diffuse, granular positivity?

Are immunostains positive for?

• parvalbumin?

• low molecular weight keratin (CAM 5.2, AE1)?

• high molecular weight keratin?

• EMA?

• vimentin?

• CD9?

Does electron microscopyshow numerous cytoplasmic microvesicles and mitochrondria?

Are the cells hypodiploid with loss of 1 or more chromosomes (1, 2, 6, 10, 13, 17, 21, and/or Y)?

Results

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