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. 2004 May 11;90(12):2364–2369. doi: 10.1038/sj.bjc.6601809

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Copyright © 2004 Cancer Research UK

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Correlation of NOS1 expression in human renal tumours with the tumour grade. Immunolocalisation of NOS1 on paraffin sections of a representative case of benign tumour (oncocytoma: A), low-malignant carcinoma (chromophobe RCC: B) and grade III clear cell RCC (C). Tumour cells were strongly labelled with the NOS1 antibody in the oncocytoma and chromophobe cell carcinoma, whereas they were negative in the high-grade RCC (original magnification × 200).