Vaginal cancer cell. Coloured scanning electron micrograph (SEM) of a vaginal squamous cell carcinoma cell. The many microvilli (small projections) on the cell's surface are typical of cancer cells. Squamous cells are a type of epithelial cell that line the vagina. Vaginal squamous cell carcinoma is the most common form of vaginal cancer. It is most common in women over 60. Magnification: x4500 when printed 10 centimetres wide.