Marginal Zone Lymphoma (MZL)

Understanding Marginal Zone Lymphoma (MZL)

Marginal zone lymphoma (MZL) is a type of non-Hodgkin lymphoma, a cancer that begins in the lymphatic system; the network of lymph nodes, organs, and vessels that helps the body fight infection. In MZL, certain white blood cells called B-lymphocytes (or B-cells) grow and divide in an uncontrolled way.

There are three main types of MZL, based on where the lymphoma begins:

• Extranodal MZL, which often starts in organs such as the stomach, lungs, or thyroid
• Nodal MZL, which develops in lymph nodes
• Splenic MZL, which mainly affects the spleen and blood

MZL usually grows slowly and is considered an indolent lymphoma, meaning many people live with it for years and sometimes do not need treatment right away. Common symptoms include painless swelling of lymph nodes, fatigue, fevers, night sweats, and weight loss. Some people may also experience stomach discomfort, fullness in the belly, or infections depending on where the lymphoma starts.

Diagnosis involves a biopsy, along with blood tests or imaging scans. Treatment may include immunotherapy, targeted therapy, chemotherapy, or antibiotics if the lymphoma is linked to certain infections. While MZL is not usually curable, it is highly treatable, and many people live long, healthy lives with effective management and regular follow-up care.