Sarcoma is cancer that forms in the connective and supportive tissue such as muscle, fat, and bone, and in soft tissues.

Sentinel lymph node (SLN) biopsy is a diagnostic procedure using radioactive dyes to help doctors identify the first lymph nodes — called the sentinel nodes — where a cancer is most likely to spread. Identifying the sentinel nodes enables doctors to remove far fewer nodes for biopsy, and helps them accurately evaluate the extent of the cancer.

Sentinel nodes are the first lymph nodes to which a cancer is likely to spread from its site of origin.

Signal Transduction Inhibitors are anti-cancer agents, also found in some foods, that disrupt the communication between cancer cells, inhibiting their growth.

Social worker is a professionally trained counselor with an advanced degree who promotes psychological health and well-being through individual, group, and family therapy and counseling. Social workers may also refer their clients for additional social service and psychiatric resources.

Stable disease is cancer that exhibits little or no change over a period of time — usually six to twelve months or more.

Stage is a measure, from one to four, of the size and extent of cancer. A lower stage indicates little or no spreading, while a higher stage reflects cancer that has metastasized, or spread, to distant areas of the body.

Stem cells are quickly multiplying, undeveloped cells produced in the bone marrow that grow to form a variety of mature red and white blood cells and platelets.

Stem cell rescue is a stem cell transplant used to replenish the bone marrow and rebuild the immune systems of people who've received high-dose chemotherapy.

Stem cell transplant (SCT) is the intravenous infusion of healthy stem cells to replenish depleted bone marrow and rebuild the immune system. It's used to create a new immune system if yours is damaged by radiation or chemotherapy or by a disease such as blood cancer. In an allogeneic transplant, you receive cells from a donor, usually a member of your own family. In an autologous transplant, your own cells are reintroduced after you receive treatment.

Stereotactic radiosurgery is a surgical procedure that locates, maps, and removes tumors that are otherwise difficult to reach, using computerassisted MRI or CT imaging technology combined with specialized external radiation to destroy brain tumors that cannot be treated by normal surgical techniques.

Surgery is the removal or repair of tissue to diagnose or treat illness, alleviate pain, improve bodily function or appearance, or occasionally for other reasons. Traditional operative techniques and instruments, minimally invasive surgery (MIS), lasers, and other techniques are widely used to diagnose and treat cancer and alleviate pain.

Debulking surgery removes part of a tumor to help make other therapies more effective or to reduce pain. Staging surgery determines the extent of cancer in the body, while reconstructive surgery is used to rebuild tissue or restore appearance, and palliative surgery relieves the symptoms of cancer.

Survivorship is the state of living with cancer and its effects, from diagnosis to long after treatment ends. Acute survivorship refers to the period during diagnosis and treatment, while extended survivorship occurs after treatment ends. Permanent survivorship refers to the period after cancer has been cured. Systemic therapy is a treatment, such as chemotherapy, that affects the entire body. These treatments can be especially effective for cancers that have spread, or metastasized.

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