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Pathology
H & E staining
Epithelioid: 60% of cases = tubulopapillary, granular, solid (~5% 5-year survival)
Sarcomatoid/mixed: 40% of cases (0% 5-year survival)
Immunohistochemical staining: Keratin positive, CEA negative, Leu M negative, calretinin positive
Cytogenetics: Deletion of short arm of chromosome 1 and 3 and long arm ...