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Fig. 1 | Surgical and Experimental Pathology

Fig. 1

From: Evaluation of the expression of Bmi-1 stem cell marker in sinonasal melanomas and its correlation with the expression of cell cycle proteins

Fig. 1

Sinonasal melanoma: a and b – histopathological features: tumor composed of small undifferentiated cells (a), which form a cuff surrounding a blood vessel (peritheliomatous arrangement). c and d – immunohistochemical findings: nuclear expression for Bmi-1 (c) and nuclear and cytoplasmic expression for p16 (d) are seen in most tumor cells

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