Cancers That Affect Lymph Nodes: What You Need to Know
- teresaamadrigal
- Apr 27, 2025
- 3 min read
When people think of cancer, they often think about tumors in organs like the breast, lung, or skin. But did you know that cancer can also affect the lymph nodes, those small, bean-shaped filters that help your body fight infection? Let’s break down how different cancers can involve the lymph nodes, what that means for the body, and how it all connects.
1. Lymphomas: Cancer That Starts in the Lymphatic System
These are primary lymphatic cancers, where they begin right in the lymphatic system itself (which includes your lymph nodes, spleen, and bone marrow).
Hodgkin Lymphoma (HL): Starts in the upper body lymph nodes like the neck, chest, or armpits. It’s identified by a special cell called the Reed-Sternberg cell and is considered one of the most treatable forms of cancer.
Non-Hodgkin Lymphoma (NHL): A group of blood cancers that can start in the lymph nodes or even in other organs. It’s more common than HL and includes many different types.
2. Leukemias: Cancer of the Blood and Bone Marrow
These cancers start in the blood-forming tissues (like bone marrow) but can also affect lymph nodes.
Chronic Lymphocytic Leukemia (CLL): Starts in the bone marrow’s white blood cells and can spread to the lymph nodes.
Acute Lymphoblastic Leukemia (ALL): A fast-growing cancer that affects blood and lymph nodes, too.
3. Metastatic Cancers: When Cancer Spreads to Lymph Nodes
Sometimes, cancer starts in one part of the body (like the breast or lung) and then spreads to the lymph nodes. This can happen through the lymphatic system or the bloodstream. Let’s look at some common cancers that do this:
Breast Cancer
Where it spreads: Usually to the underarm (axillary) lymph nodes first.
Why it matters: If cancer spreads to these nodes, it’s usually Stage 2 or higher.
Lung Cancer
Where it spreads: Neck (cervical), collarbone area (supraclavicular), and the chest area (mediastinal).
Melanoma (Skin Cancer)
Where it spreads: Lymph nodes in the groin, armpits, or neck, often early on.
Gastrointestinal Cancers
Where it spreads: Abdominal nodes near the intestines (mesenteric) and behind the organs (retroperitoneal).
Head and Neck Cancers
Where it spreads: Lymph nodes in the neck (cervical nodes).
Kidney Cancer
Where it spreads: Abdominal lymph nodes.
Cervical Cancer
Where it spreads: Pelvic and lower abdominal lymph nodes.
Testicular Cancer
Where it spreads: Abdominal lymph nodes.
Thyroid Cancer
Where it spreads: Lymph nodes in the neck.
Breast Cancer (Other Types)
Where it spreads: Underarm (axillary), collarbone (supraclavicular), and near the breastbone (internal mammary) lymph nodes.
Why Does It Matter?
When cancer spreads to the lymph nodes, it can travel to other parts of the body more easily. The lymphatic system acts like a highway for cancer cells. Once they reach the lymph nodes, they can move through the body’s fluid system and potentially set up new tumors in organs like the bones, lungs, liver, or brain.
Connecting It All: How Cancer Moves Through the Body
Let’s think about it step-by-step:
Cancer starts in an organ (like the breast or lung).
Cancer cells break away and enter nearby lymphatic vessels.
These cells travel to the closest lymph nodes.
If not caught early, cancer can spread further to other organs.
That’s why doctors always check the lymph nodes when diagnosing and treating cancer, it helps them understand how far the cancer has spread and what treatments might be needed.
Something to think about:
Learning how cancer spreads to the lymph nodes helps us understand why early detection and treatment are so important. Knowing what’s happening in your body—especially with something as important as lymph nodes can empower you to make informed decisions and work closely with your doctor.
If you’ve been diagnosed with cancer, ask your doctor about lymph node involvement and what it means for your treatment plan.
*Sources:
Healthline. (2019). What Does It Mean If Breast Cancer Spreads to Your Lymph Nodes? Retrieved from https://www.healthline.com/health/breast-cancer/breast-cancer-lymph-nodes
Cancer Research UK. (2023). Symptoms of metastatic lung cancer. Retrieved from https://www.cancerresearchuk.org/about-cancer/lung-cancer/metastatic/symptoms
National Cancer Institute. (2020). Melanoma Cells that Pass through Lymph More Likely to Spread. Retrieved from https://www.cancer.gov/news-events/cancer-currents-blog/2020/melanoma-spread-lymph-nodes-ferroptosis
MDPI. (2023). Lymph Node Metastasis in Gastrointestinal Carcinomas. Retrieved from https://www.mdpi.com/1718-7729/31/8/333
The Times. (2025). Treatment could 'change the world' for head and neck cancers. Retrieved from https://www.thetimes.co.uk/article/new-immunotherapy-treatment-head-neck-cancers-vnx979f0g
National Cancer Institute. (2024). Metastatic Cancer: When Cancer Spreads. Retrieved from https://www.cancer.gov/types/metastatic-cancer
American Cancer Society. (2023). Cervical Cancer Stages. Retrieved from https://www.cancer.org/cancer/cervical-cancer/detection-diagnosis-staging/staging.html
American Cancer Society. (2023). Testicular Cancer Stages. Retrieved from https://www.cancer.org/cancer/testicular-cancer/detection-diagnosis-staging/staging.html
Verywell Health. (2024). Signs and Symptoms That Thyroid Cancer Is Metastasizing. Retrieved from https://www.verywellhealth.com/signs-thyroid-cancer-has-spread-8575712
National Cancer Institute. (2024). Metastatic Cancer: When Cancer Spreads. Retrieved from https://www.cancer.gov/types/metastatic-cancer
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