Adult T-Cell Leukemia/Lymphoma (ATLL)

Adult T-Cell Leukemia/Lymphoma is a rare blood cancer that affects white blood cells called T-cells. This condition is caused by the HTLV-1 virus, which stands for human T-cell lymphotropic virus type 1. The virus changes healthy T-cells into cancer cells over many years.

ATLL typically develops in adults who were infected with HTLV-1 during childhood through breastfeeding, blood transfusions, or sexual contact. Most people with HTLV-1 never develop cancer. Only about 2 to 5 out of 100 infected people will develop ATLL in their lifetime. The cancer cells often have a distinctive cloverleaf shape when viewed under a microscope.

There are four types of ATLL ranging from slow-growing to aggressive. The acute and lymphoma types progress quickly and require immediate treatment. The smoldering and chronic types grow more slowly and may be monitored without immediate treatment. Understanding your risk and getting tested early can help catch changes before they become serious.

• Skin rashes or lesions that may appear raised or scaly
• Swollen lymph nodes in the neck, armpits, or groin
• Enlarged liver or spleen causing belly discomfort
• Weakness and fatigue that doesn't improve with rest
• Frequent infections due to weakened immune system
• Bone pain or fractures from weakened bones
• High calcium levels causing confusion, thirst, or nausea
• Unexplained weight loss over several weeks or months
• Fever without obvious infection
• Digestive problems including diarrhea or stomach pain

Some people with slow-growing ATLL have no symptoms for months or years. The smoldering type may only show slightly elevated lymphocyte counts on blood tests. Symptoms often appear gradually and may be mistaken for less serious conditions at first.

ATLL is caused by chronic infection with the HTLV-1 virus. This virus is found most commonly in Japan, the Caribbean, South America, parts of Africa, and some regions of the Middle East. People born in these areas or whose parents came from these regions have higher risk. The virus spreads through breast milk, sexual contact, blood transfusions, or sharing needles. In the United States, blood donations are screened for HTLV-1 to prevent transmission.

After infection, HTLV-1 remains in the body for life and slowly damages T-cells. Most infected people never develop cancer. Risk factors for progression to ATLL include infection at a young age, family history of ATLL, and genetic factors that affect immune function. The time from infection to cancer development is typically 40 to 60 years. Men are slightly more likely to develop ATLL than women. There is no way to prevent progression once infected, which makes monitoring important for those who know they carry the virus.

ATLL is diagnosed through blood tests that show elevated lymphocyte counts and abnormal T-cells with characteristic cloverleaf-shaped nuclei. A complete blood count measures the number and appearance of different white blood cells. Blood smear examination allows doctors to see the distinctive shape of ATLL cancer cells under a microscope. Additional tests check for HTLV-1 antibodies to confirm viral infection.

Rite Aid's blood testing service includes lymphocyte measurement as part of our core panel. This test can help detect abnormal white blood cell counts that may indicate ATLL or other blood conditions. If ATLL is suspected, your doctor will order specialized tests including flow cytometry to identify cancer cell markers, bone marrow biopsy to check cancer spread, and imaging tests to look for enlarged lymph nodes or organs. Calcium levels are also checked because ATLL often causes dangerous elevations.

• Watchful waiting for slow-growing smoldering or chronic types with regular monitoring
• Chemotherapy combinations targeting fast-growing cancer cells in acute or lymphoma types
• Antiviral therapy with zidovudine and interferon alpha for some ATLL types
• Stem cell transplant for eligible patients to replace cancerous bone marrow
• Monoclonal antibody therapy targeting specific proteins on cancer cells
• Radiation therapy for skin lesions or enlarged lymph nodes causing symptoms
• Medications to lower dangerously high calcium levels
• Antibiotics and antifungals to prevent and treat infections
• Nutritional support to maintain strength during treatment
• Clinical trials offering access to new targeted therapies