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World Health Organization Classification of Tumours Pathology and ...

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TP53 tumour suppressor gene in 27% <strong>of</strong>the chromophobe RCCs. Sükösd et al.{2531} demonstrated loss <strong>of</strong> heterozygosity(LOH) around the PTEN gene atthe 10q23.3 chromosomal region.Prognosis <strong>and</strong> predictive factorsSarcomatoid phenotype is associatedwith aggressive tumour growth <strong>and</strong> thedevelopment <strong>of</strong> metastasis.AFig. 1.37 Chromophobe renal cell carcinoma. A Electron micrograph showing the numerous cytoplasmicmicrovesicles <strong>and</strong> thick cytoplasmic membranes. B The perinuclear rarefaction <strong>and</strong> peripheral condensation<strong>of</strong> mitochondria responsible for the perinuclear halos.BFig. 1.38 Chromophobe renal cell carcinoma. Survival curves by grade for patients with chromophobe renalcell carcinoma. From C.M. Lohse et al. {1532}.32 <strong>Tumours</strong> <strong>of</strong> the kidney

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