Lymphoma: Hodgkin and Non-Hodgkin Disease Explained

Lymphoma is a cancer of the lymphatic system, most often involving lymphocytes, a type of white blood cell that helps the body fight infection. Hodgkin lymphoma and non-Hodgkin lymphoma can look similar at first, but they differ in cell type, behavior, staging, and treatment planning.

Overview

Lymphoma is a group of cancers that start in the lymphatic system, a network of lymph nodes, vessels, and organs that supports immune defense and fluid balance. The condition most commonly begins in lymphocytes, which are white blood cells involved in recognizing and fighting infections. Because lymph tissue is found throughout the body, lymphoma can appear in the neck, armpits, chest, abdomen, groin, spleen, bone marrow, or less commonly in organs such as the stomach, skin, brain, or testes.

The two main categories are Hodgkin lymphoma and non-Hodgkin lymphoma. Hodgkin lymphoma is identified by the presence of characteristic abnormal cells, often called Reed-Sternberg cells, when tissue is examined under a microscope. Non-Hodgkin lymphoma is not one disease, but a large and diverse group of lymphomas that may arise from B lymphocytes, T lymphocytes, or natural killer cells.

Lymphoma can be slow-growing or fast-growing. Some types develop gradually and may not need immediate treatment, while others progress quickly and require prompt therapy. The outlook and treatment plan depend on the exact lymphoma subtype, stage, tumor biology, symptoms, age, general health, and response to treatment.

Hodgkin vs Non-Hodgkin Lymphoma

Hodgkin lymphoma and non-Hodgkin lymphoma may both cause enlarged lymph nodes and general symptoms, but they are biologically different. Hodgkin lymphoma often starts in one group of lymph nodes and may spread in a more orderly pattern from one region to the next. It is commonly diagnosed in young adults and in older adulthood, although it can occur at other ages.

Non-Hodgkin lymphoma includes many subtypes, ranging from indolent forms that can remain stable for years to aggressive forms that grow rapidly. It is more common than Hodgkin lymphoma overall and is often classified by the cell type involved, such as B-cell lymphoma or T-cell lymphoma. Examples include diffuse large B-cell lymphoma, follicular lymphoma, mantle cell lymphoma, marginal zone lymphoma, Burkitt lymphoma, and peripheral T-cell lymphoma.

Accurate classification is essential because treatments differ significantly. A person with a slow-growing lymphoma may be monitored carefully before starting treatment, while another person with an aggressive subtype may need treatment soon after diagnosis. For this reason, biopsy results are usually reviewed with specialized pathology and may include immunohistochemistry, flow cytometry, cytogenetic tests, or molecular studies.

Symptoms

The most common sign of lymphoma is a painless swollen lymph node, often noticed in the neck, armpit, or groin. However, swollen lymph nodes are far more often caused by infections or inflammation than by cancer. A medical evaluation is important when swelling persists, enlarges, or is accompanied by other symptoms.

Some people develop general symptoms known as B symptoms. These include unexplained fever, drenching night sweats, and unintentional weight loss. Other symptoms can include unusual tiredness, itching, reduced appetite, or a feeling of fullness in the upper left abdomen due to an enlarged spleen.

Symptoms also depend on where lymphoma is located. Lymphoma in the chest may cause cough, shortness of breath, or chest pressure. Lymphoma in the abdomen may cause bloating, abdominal pain, nausea, or changes in bowel habits. In rare cases, lymphoma affecting the brain or spinal cord can cause headaches, weakness, confusion, or vision changes.

• Painless lymph node swelling lasting more than a few weeks
• Fever without a clear infection
• Drenching night sweats
• Unexplained weight loss
• Persistent fatigue, itching, cough, or abdominal fullness

Causes and Risk Factors

In most people, lymphoma does not have one clear cause. It develops when lymphocytes acquire genetic changes that allow them to multiply abnormally or survive longer than they should. These changes are usually not inherited and may occur over time. Having a risk factor does not mean a person will develop lymphoma, and many people diagnosed with lymphoma have no obvious risk factors.

Certain conditions can increase risk. These include a weakened immune system, such as after organ transplantation or with some immune-suppressing medicines, and some inherited or acquired immune disorders. Some infections are associated with particular lymphoma subtypes, including Epstein-Barr virus, human immunodeficiency virus, human T-cell lymphotropic virus type 1, hepatitis C, and Helicobacter pylori in certain stomach lymphomas.

Autoimmune diseases, such as rheumatoid arthritis, Sjögren syndrome, or celiac disease, may be linked with some lymphoma types. Age, sex, family history, and previous cancer treatments can also influence risk. Environmental exposures have been studied, but for many individuals no specific exposure is identified. Patients should avoid self-blame; lymphoma is not caused by stress, minor injuries, or everyday contact with someone who has cancer.

Diagnosis and Staging

Diagnosis begins with a medical history, physical examination, and assessment of lymph node areas, the spleen, liver, and any symptoms. Blood tests may evaluate blood cell counts, kidney and liver function, inflammation markers, and sometimes lactate dehydrogenase, which can reflect disease activity in some lymphomas. Blood tests alone, however, cannot confirm most lymphomas.

A biopsy is the key diagnostic test. Whenever possible, doctors prefer removing an entire lymph node or a substantial tissue sample, because this preserves the structure needed for accurate classification. Fine-needle aspiration alone is often not enough to diagnose and subtype lymphoma. The tissue is examined by a pathologist and may be tested for surface markers, chromosome changes, and gene alterations.

Imaging helps show where lymphoma is located. Depending on the case, tests may include ultrasound, computed tomography, positron emission tomography combined with computed tomography, or magnetic resonance imaging. Some patients need bone marrow biopsy, lumbar puncture, endoscopy, or organ-specific tests. Staging describes how widespread the lymphoma is and helps guide treatment, but in lymphoma, stage is only one part of the treatment decision; subtype and tumor biology are equally important.

Treatment Options

Treatment is individualized. Some slow-growing non-Hodgkin lymphomas that are not causing symptoms may be managed with active monitoring, sometimes called watchful waiting. This does not mean the condition is being ignored; it involves scheduled examinations, blood tests, imaging when needed, and starting treatment if the lymphoma grows, causes symptoms, or affects organ function.

Many lymphomas are treated with systemic therapies that travel through the bloodstream. Chemotherapy may be combined with immunotherapy, such as monoclonal antibodies that target lymphoma cells. Targeted therapies may block specific growth signals inside cancer cells, and newer immune-based treatments may be used in selected relapsed or resistant cases. Radiation therapy can be useful for localized disease, symptom control, or as part of a combined plan.

Stem cell transplantation may be considered for some patients, particularly when lymphoma returns or does not respond adequately to initial treatment. Supportive care is also important and may include infection prevention, management of anemia or low blood counts, fertility counseling before treatment, vaccination planning, nutritional support, and help with fatigue. Treatment teams usually include hematologists, medical oncologists, radiation oncologists, radiologists, pathologists, nurses, pharmacists, and supportive care specialists.

Patients are encouraged to ask about the exact lymphoma subtype, the goal of treatment, expected benefits and side effects, whether fertility may be affected, and what follow-up will involve. The best treatment plan is one that matches the medical features of the disease as well as the patient’s preferences, overall health, and life circumstances.

Prevention, Self-Care, and Follow-Up

There is no guaranteed way to prevent lymphoma. However, general health measures can support immune function and overall resilience. These include avoiding tobacco, limiting alcohol, maintaining a balanced diet, staying physically active as tolerated, managing chronic infections under medical care, and following vaccination advice from a doctor, especially before or after immune-suppressing treatment.

During and after treatment, patients should report fever, signs of infection, unusual bleeding or bruising, severe fatigue, worsening shortness of breath, or new neurological symptoms promptly. People receiving lymphoma treatment may have periods of reduced immunity, so hand hygiene, food safety, dental care, and avoiding close contact with people who have contagious illnesses may be recommended. Exercise, when approved by the care team, can help reduce fatigue and maintain strength.

Follow-up care checks for response to treatment, recurrence, late effects, and general health needs. Appointments may include physical examinations, blood tests, and imaging based on the lymphoma subtype and treatment history. Long-term survivorship care may address heart health, thyroid function after neck radiation, bone health, emotional well-being, fertility, and screening for other cancers when appropriate.

When to See a Doctor

A person should seek medical advice if a lymph node remains enlarged for more than a few weeks, continues to grow, feels firm or fixed, or appears along with fever, night sweats, unexplained weight loss, persistent fatigue, itching, or ongoing cough. Many causes are benign and treatable, but persistent symptoms deserve proper evaluation.

Urgent medical attention is needed for difficulty breathing, chest pressure, severe weakness, confusion, uncontrolled bleeding, high fever during cancer treatment, or rapidly worsening symptoms. Patients already diagnosed with lymphoma should contact their care team if they develop signs of infection, new swelling, severe pain, or side effects that affect eating, drinking, or daily activities.

International patients who need evaluation or treatment for lymphoma may access multidisciplinary specialists at Acibadem International, where JCI-accredited hospitals provide diagnostic and treatment services across hematology, oncology, pathology, imaging, radiation oncology, and supportive care. Decisions should always be made after a full medical assessment and discussion with a qualified doctor.

Frequently asked questions

Is lymphoma the same as leukemia?

Lymphoma and leukemia are both blood cancers, but they usually begin and behave differently. Lymphoma typically starts in lymph nodes or lymphatic tissue, while leukemia usually begins in the bone marrow and affects blood cells circulating in the bloodstream. Some diseases can overlap, so the exact diagnosis depends on laboratory and pathology testing.

Are swollen lymph nodes always a sign of lymphoma?

No. Swollen lymph nodes are commonly caused by infections, dental problems, skin inflammation, autoimmune conditions, or recent vaccinations. Lymphoma is considered when swelling persists, enlarges, is unexplained, or occurs with symptoms such as night sweats, fever, or weight loss.

Can lymphoma be cured?

Some lymphomas can be cured, especially certain Hodgkin lymphomas and some aggressive non-Hodgkin lymphomas when treated effectively. Other lymphomas may be chronic conditions that are controlled for long periods with monitoring and treatment when needed. Prognosis depends on the subtype, stage, biology, response to therapy, and the patient’s overall health.

What is the most important test for lymphoma?

A tissue biopsy is usually the most important test because it confirms the diagnosis and identifies the lymphoma subtype. Imaging and blood tests are also important, but they cannot replace microscopic and molecular evaluation of tissue. An excisional or core biopsy is often preferred when feasible.

Does lymphoma treatment always cause hair loss?

Not always. Hair loss depends on the specific medicines or radiation fields used. Some treatments cause noticeable hair loss, while others may cause thinning or no hair changes. The care team can explain what is likely with a particular treatment plan and how to manage scalp and hair care.

Can a person work or travel during lymphoma treatment?

Some people continue working or travel between treatments, while others need to reduce activities because of fatigue, infection risk, or treatment schedules. Plans should be discussed with the medical team, especially before international travel or flights. Patients may need guidance about vaccines, medications, medical documents, and when to seek urgent care.

References

• World Health Organization
• National Cancer Institute
• American Cancer Society
• European Society for Medical Oncology
• Leukemia and Lymphoma Society

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.