Final answer:
Cancer of the epithelial tissue is known as carcinoma. This includes various common cancers such as squamous cell carcinoma, which affects squamous cells in the epidermis and is typically treatable if detected early.
Step-by-step explanation:
Cancer of the epithelial tissue is known as carcinoma. Carcinoma is a type of cancer that arises from epithelial cells, which are the cells that make up the skin and lining of organs and glands. This category of cancer includes many common cancers such as those of the breast, prostate, lung, and colon. For instance, basal cell carcinoma is derived from the skin's epithelial cells.
Another example is squamous cell carcinoma, which affects the squamous cells in the epidermis. These cells are flat and filled with keratin, found in the upper layers of the skin. Squamous cell carcinoma can manifest as a red, firm nodule or as a flat lesion with a scaly surface and is usually curable if treated early.
Other types of cancers include sarcoma, which originates from connective tissue; lymphoma, from lymphatic cells; leukemia, from blood-forming cells; and germ cell tumors, from totipotent cells typically in the testicles and ovaries.