Acute Lymphoid Leukemia (ALL) Treatment Options at Penn

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Different treatments are available for those with acute lymphoblastic leukemia (ALL). Some treatments are called standard. This means they are the currently used treatments. Some treatments are being tested in clinical trials. A treatment clinical trial is a study meant to help improve current treatments or obtain information on new treatments.

When clinical trials show that a new treatment is better than the standard treatment, the new treatment may become the standard treatment. You may want to think about taking part in a clinical trial. Some clinical trials are open only to patients who have not started treatment, while others are available during or after treatment.

Treatment options vary depending on your situation including the stage of the cancer and other factors that may be present.

Talk with your team about the approach that is best for you.

The treatment of adult ALL usually has 2 phases.

• Remission induction therapy: This is the first phase of treatment. Its purpose is to kill the leukemia cells in the blood and bone marrow. This puts the leukemia into remission.
• Post-remission therapy: This is the second phase of treatment. It begins once the leukemia is in remission. The purpose of post-remission therapy is to kill any remaining leukemia cells that may not be active but could begin to re-grow and cause a relapse.

Treatment called central nervous system (CNS) sanctuary therapy is usually given during each phase of therapy. Because chemotherapy that is given by mouth or injected into a vein may not reach leukemia cells in the CNS (brain and spinal cord), the cells are able to find "sanctuary" (hide) in the CNS. Intrathecal chemotherapy and radiation therapy are able to reach leukemia cells in the CNS and are given to kill the leukemia cells and prevent the cancer from recurring (coming back). CNS sanctuary therapy is also called CNS prophylaxis.

Standard treatments for patients with adult ALL offered at Penn

Chemotherapy

Chemotherapy is a cancer treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. When chemotherapy is taken by mouth or injected into a vein or muscle, the drugs enter the bloodstream and can reach cancer cells throughout the body (systemic chemotherapy). When chemotherapy is placed directly into the spinal column (intrathecal chemotherapy), an organ, or a body cavity such as the abdomen, the drugs mainly affect cancer cells in those areas (regional chemotherapy). Combination chemotherapy is treatment using more than one anticancer drug. The way the chemotherapy is given depends on the type and stage of the cancer being treated.

Intrathecal chemotherapy may be used to treat adult ALL that has spread, or may spread, to the brain and spinal cord. When used to prevent cancer from spreading to the brain and spinal cord, it is called central nervous system (CNS) sanctuary therapy or CNS prophylaxis. Intrathecal chemotherapy is given in addition to chemotherapy by mouth or vein.

Radiation therapy

Radiation therapy is a cancer treatment that uses high-energy x-rays or other types of radiation to kill cancer cells or keep them from growing.

• External radiation (or external beam radiation) comes from a machine outside the body. The machine directs high-energy rays at the cancer and some normal surrounding tissue. It is the most often used radiation treatment. The machine used to deliver the high-energy rays is called a linear accelerator.

• Three-dimensional (3-D) conformal radiation treatment is a type of external beam radiation. It uses computers to allow doctors to more precisely target a
  tumor with radiation beams (using width, height, and depth).

• Intensity-modulated radiation treatment (IMRT). IMRT is a type of 3-D conformal radiation treatment that uses radiation beams (usually x-rays) of
  various intensities to give different doses of radiation, at the same time, to small
  areas of tissue. This allows the delivery of higher doses of radiation to the tumor
  and lower doses to nearby healthy tissue.

• Internal radiation treatment, or brachytherapy, is given by placing an implant into or near the tumor. The implant is a small container that holds the
  radioactive source or material. Internal radiation treatment allows your doctor
  to give a higher total dose of radiation to a smaller area and in a shorter time
  than with external radiation treatment.

• Photodynamic therapy (PDT) combines a drug called a photosensitizer or photosensitizing agent with a specific type of light to kill cancer cells.
  Photosensitizers are drugs that when exposed to a specific wavelength of light,
  produce a form of oxygen that kills nearby cells. PDT can also work by
  shrinking or destroy tumors by damaging blood vessels in the tumor. This
  prevents the cancer from receiving nutrients. Also, PDT may activate the
  immune system to attack the tumor cells.

• Stereotactic radiosurgery is a a type of external radiation therapy that uses special equipment to position the patient and precisely give a single large dose of radiation to a tumor. It is used to treat brain tumors and other brain disorders that cannot be treated by regular surgery. It is also being studied in the treatment of other types of cancer. Also called radiation surgery, radiosurgery, and stereotaxic radiosurgery.

• Proton Therapy is the most precise form of radiation treatment for cancer possible, while minimizing damage to healthy tissue and surrounding organs.

Chemotherapy with stem cell transplant

Stem cell transplant is a method of giving chemotherapy and replacing blood-forming cells destroyed by the cancer treatment. Stem cells (immature blood cells) are removed from the blood or bone marrow of the patient or a donor and are frozen and stored. After the chemotherapy is completed, the stored stem cells are thawed and given back to the patient through an infusion. These reinfused stem cells grow into (and restore) the body's blood cells.

Tyrosine kinase inhibitor therapy

Anticancer drugs called tyrosine kinase inhibitors are used to teat some types of adult ALL. These drugs block the enzyme, tyrosine kinase, that causes stem cells to develop into more white blood cells (blasts) than the body needs. Two of the drugs used are imatinib mesylate (Gleevec) and dasatinib.

Biologic therapy

Biologic therapy is a treatment that uses the patient's immune system to fight cancer. Substances made by the body or made in a laboratory are used to boost, direct, or restore the body's natural defenses against cancer. This type of cancer treatment is also called biotherapy or immunotherapy.

New types of treatment are being tested in clinical trials at Penn.