Squamous cell carcinoma takes several forms, including flat, scaly skin patches, open sores, raised red lumps and growths that resemble warts, explains the American Cancer Society. While some squamous cell carcinomas have crusty, bloody or oozing patches, this type of skin cancer can also resemble mostly normal skin.
Because squamous cell carcinoma can present in diverse ways, patients should consult their doctor if they notice new growths, open sores or permanent patches of scaly skin, especially on areas prone to this type of skin cancer, explains the American Cancer Society. Squamous cell carcinomas occur mostly on areas that are exposed to sunlight, including the face, neck, lips and the back of the hand. This type of skin cancer is less commonly found on the genitals and anus, notes Mayo Clinic.