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Cancer Treatment Centers of America


Carcinoma is the most common type of cancer. It begins in the epithelial tissue of the skin, or in the tissue that lines the internal organs, such as the liver or kidneys.

Carcinomas may spread to other parts of the body, or be confined to the primary location:

  • Carcinoma in situ: An early stage cancer that is still confined to the layer of tissue from which it started, and has not spread to surrounding tissue or other parts of the body.
  • Invasive carcinoma: The cancer has spread beyond the primary tissue layer to surrounding tissue
  • Metastatic carcinoma: The cancer has spread throughout the body to other tissues and organs.

Types of carcinoma

Carcinomas can occur in many parts of the body. Some common types of carcinoma include:

  • Basal cell carcinoma: The most common type of skin cancer. Cancerous cells develop within the basal cell layer of the skin, or the lowest part of the epidermis. Basal cell cancers usually grow slowly, and it is rare for them to spread, or metastasize, to nearby lymph nodes or even more distant parts of the body.
  • Squamous cell carcinoma: The second most common type of skin cancer. Cancerous cells develop from the flat, squamous cells that are the primary cell type making up the outermost layer of the skin, the epidermis. Squamous cell cancers usually grow slowly, and it is uncommon for them to spread, or metastasize, but they are more likely than basal cell carcinomas to invade fatty tissue beneath the skin or to spread even further.
  • Renal cell carcinoma (RCC): The most common type of kidney cancer. The cancerous cells typically develop in the lining of very small tubes in the kidney, called tubules. Over time, these cells may grow into a mass and cause an obstruction. The cancer may form in one or both of the kidneys.
  • Ductal carcinoma in situ (DCIS): The most common type of breast cancer. Cancerous cells are confined within the lining of the milk ducts, and haven't spread through the duct walls into surrounding breast tissue.
  • Invasive ductal carcinoma: Cancerous cells grow in the duct lining, break through the wall of the duct and invade local breast tissue. From there, the cancer may spread (metastasize) to other parts of the body.

Carcinoma treatment & therapy options

Treatment for carcinoma varies depending on the type, location and extent of the disease, but may include:

  • Surgery: Depending on the type of cancer, carcinoma may be treated with surgical removal of cancerous tissue, as well as some surrounding tissue. Minimally invasive surgical treatment methods can help to reduce healing time and minimize the risk of infection after surgery.
  • Radiation therapy: Radiation therapy may be used in combination with surgery and/or chemotherapy. Advanced radiation therapies make use of image guidance before and during treatment to target tumors, while sparing healthy tissues and surrounding organs.
  • Chemotherapy: Chemotherapy treats carcinoma with drugs that destroy cancer cells, either throughout the whole body, or in a specific area. In some cases, chemotherapy may be used in combination with other treatments, such as radiation therapy or surgery.

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