AP BIOLOGY

Detailed explanation-1: -A condition in which abnormal cells that look like cancer cells under a microscope are found only in the place where they first formed and haven’t spread to nearby tissue.

Detailed explanation-2: -In situ-Abnormal cells are present but have not spread to nearby tissue. Localized-Cancer is limited to the place where it started, with no sign that it has spread. Regional-Cancer has spread to nearby lymph nodes, tissues, or organs. Distant-Cancer has spread to distant parts of the body.

Detailed explanation-3: -Melanoma in situ is also called stage 0 melanoma. It means there are cancer cells in the top layer of skin (the epidermis). The melanoma cells are all contained in the area in which they started to develop and have not grown into deeper layers of the skin. Some doctors call in situ cancers pre cancer.

Detailed explanation-4: -A condition in which abnormal cells are found in the tissues that form the surface of the skin, the lining of the hollow organs of the body (such as the bladder and uterus), and the lining of the respiratory and digestive tracts.

Detailed explanation-5: -Abstract. Precancerous skin lesions and carcinomas in situ of the skin represent the early stages of epithelial skin tumors. There is no invasive tumor growth, so the basement membrane is completely intact. These lesions show a wide variation of clinical and histological appearances on the skin or mucosa.