What cancers cause swollen lymph nodes?

Many can. Non-hodgkin's lymphoma and hodgkin's lymphoma commonly cause swelling of lymph nodes. But any cancer that spreads to a lymph node can cause swelling of the involved lymph nodes.
Lymphomas & mets. Primary cancers of the lymph nodes, lymphomas, and any tumor that spreads to the lymph nodes cause enlargement.
Many. Many cancers cause swollen lymph nodes. Head and neck cancers can have rock-hard, enlarged cervical or supraclavicular lymph nodes. Breast cancer can cause axillary lymph nodes to be enlarged.

Related Questions

Could poor oral hygiene cause swollen lymph nodes?

Definitely. Swollen lymph nodes are one of the body's chief ways to ward off disease from infection, tumors, etc. Small lymph vessels connect each node like a string of pearls trapping cellular debris and fluid to be filtered, drained, and diseases destroyed by this lymphatic system located everywhere throughout the body. Poor oral hygiene can lead to infection which drains to the nearby lymph nodes. Read more...