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. Author manuscript; available in PMC: 2010 May 5.
Published in final edited form as: J Otolaryngol Head Neck Surg. 2010 Apr;39(2):157–166.

Figure 2.

Figure 2

Proliferation index of different subtypes of human primary nasopharyngeal carcinoma (NPC) A, Triple-immunolabeling was performed using anti-Ki-67 (green), anti-MCM2 (purple), and anti-PCNA (red) in human primary NPC. Nuclei were counterstained by DAPI (blue). Top panel: low magnification; bottom panel: high magnification. B, Sections of different subtypes of primary NPC were immunostained using anti-Ki-67 antibody. Top panel: low magnification; bottom panel: high magnification. C, Ki-67-positive cells in different subtypes of primary NPC were calculated as the percentage of all tumour cells that were Ki-67-immunopositive cells. Data are mean value ± SEM. K-NPC = keratinizing NPC; NK-NPC = nonkeratinizing NPC; UN-NPC = undifferentiated NPC.