Lymphoma

Lymphoma is a type of blood cancer that develops in the lymphatic system — the body's immune network — and ranks among the most frequently diagnosed cancers globally. It can affect people of all ages, and because its early symptoms often resemble those of far more common conditions, it is frequently diagnosed later than it might otherwise be.

This guide covers everything you need to know about lymphoma: what it is, how the major types differ from one another, what symptoms to look out for, how it is diagnosed, and what treatment options are available today

What Is Lymphoma?

Lymphoma is a cancer of the lymphatic system — the network of tissues, organs, and vessels that plays a central role in the body's immune defence. It originates in lymphocytes, a type of white blood cell, and can develop in lymph nodes, the spleen, bone marrow, the thymus, or other organs throughout the body.

Unlike many cancers that begin in a specific organ, lymphoma can arise almost anywhere lymphatic tissue is found, which is part of what makes it a broad and complex disease category. There are more than 70 distinct subtypes, but they all fall under two major classifications: Hodgkin's lymphoma and non-Hodgkin's lymphoma.

Hodgkin's Lymphoma vs. Non-Hodgkin's Lymphoma: What's the Difference?

The distinction between these two categories is more than administrative — it has direct implications for how the disease behaves and how it is treated.

Hodgkin's Lymphoma

Hodgkin's lymphoma is defined by the presence of Reed-Sternberg cells, large abnormal lymphocytes that are visible under a microscope. It typically spreads in a predictable, orderly pattern from one lymph node group to the next, which makes it one of the most treatable cancers in modern oncology. Hodgkin's lymphoma is most commonly diagnosed in young adults between 20 and 35, and again in adults over 55.

Hodgkin's lymphoma symptoms often develop gradually and may include swollen, painless lymph nodes in the neck, armpits, or groin, persistent fatigue, unexplained fever, drenching night sweats, and unintended weight loss. These three symptoms — fever, night sweats, and weight loss — are collectively known as "B symptoms" and carry important prognostic significance. The Hodgkin's lymphoma survival rate is among the highest of any cancer: with modern treatment, the five-year survival rate exceeds 85% overall, and reaches above 90% for early-stage disease.

Non-Hodgkin's Lymphoma

Non-Hodgkin's lymphoma (NHL) is a far larger and more heterogeneous group, encompassing dozens of distinct subtypes with widely varying behaviour, from slow-growing indolent forms to aggressive, fast-moving disease. NHL is considerably more common than Hodgkin's lymphoma, accounting for the vast majority of all lymphoma diagnoses.

NHL can arise from either B-cells or T-cells — two different types of lymphocytes — and this distinction is fundamental to how it is classified and treated.

The Major Subtypes of Lymphoma

With more than 70 recognised types, lymphoma is a disease of considerable variety. The following are among the most clinically significant subtypes.

B-cell lymphomas are the most common category overall, accounting for roughly 85% of all non-Hodgkin's cases. Within this group:

• Diffuse large B-cell lymphoma (DLBCL) is the most common aggressive subtype, growing rapidly and requiring prompt treatment. It is, however, potentially curable with chemotherapy-based regimens.
• Follicular lymphoma is the most prevalent indolent (slow-growing) B-cell lymphoma. It tends to respond well to treatment, though it can relapse over time and may transform into a more aggressive form.
• Mantle cell lymphoma is a less common but typically aggressive subtype that tends to be diagnosed at an advanced stage and requires intensive treatment approaches.
• MALT lymphoma (mucosa-associated lymphoid tissue lymphoma) arises in mucous membranes, most frequently in the stomach, often in association with H. pylori infection. It is generally slow-growing and can sometimes be treated by addressing the underlying infection.
• Burkitt's lymphoma is one of the fastest-growing cancers known, with tumour cells doubling in under 24 hours. It requires immediate, intensive chemotherapy and is highly curable when treated early.
• CNS lymphoma (central nervous system lymphoma) is a rare form that arises in the brain, spinal cord, or eyes, and requires specialised treatment protocols that can cross the blood-brain barrier.

T-cell lymphomas are considerably rarer than their B-cell counterparts and often more difficult to treat. They include:

• Cutaneous lymphoma, which affects the skin and includes subtypes such as mycosis fungoides (also referred to as fungoid mycosis lymphoma). These conditions typically progress slowly and may remain confined to the skin for years before spreading.
• Other T-cell subtypes such as anaplastic large cell lymphoma and peripheral T-cell lymphoma, which can be more aggressive.

Recognising Lymphoma Symptoms

Early recognition of lymphoma symptoms can meaningfully change outcomes. The disease does not always produce obvious warning signs, and symptoms are frequently mistaken for more common conditions such as infections or fatigue-related illness.

The most consistent and widely recognised symptom is painless swelling of one or more lymph nodes, most often in the neck, armpits, or groin. Unlike swollen glands caused by infection, lymphoma-related swelling does not resolve after a few weeks.

General Symptoms to Watch For

Constitutional symptoms — those affecting the whole body — are common across both major types. These include:

• Persistent, unexplained fatigue that doesn't improve with rest
• Fever without an obvious infectious cause
• Drenching night sweats
• Unintended weight loss of more than 10% of body weight over six months
• Itching of the skin without a rash or identifiable cause
• Shortness of breath or coughing, if lymph nodes in the chest are affected

Symptoms of Lymphoma in Females

While lymphoma affects both sexes, there are some particular considerations for women. Symptoms of lymphoma in females can sometimes be misattributed to hormonal fluctuations, anaemia, or autoimmune conditions. Fatigue, abdominal swelling or discomfort (if pelvic or abdominal nodes are affected), and persistent itching are symptoms that warrant investigation, particularly if they don't resolve or have no clear explanation.

Lymphoma Rash and Skin Manifestations

A lymphoma rash is most commonly associated with cutaneous lymphoma, particularly mycosis fungoides. This condition begins in the skin and in its early stages may closely resemble eczema or psoriasis — producing flat, scaly, itchy patches that can persist for months or years before a diagnosis is made.

Lymphoma rashes on legs are a common early presentation of mycosis fungoides, appearing as pale, slightly raised patches that may be confused with dry skin or dermatitis. As the condition progresses, lesions can thicken into plaques and, in later stages, form raised tumour-like nodules. Any persistent, treatment-resistant skin rash should be evaluated by a dermatologist with experience in cutaneous conditions, particularly if it has been present for an extended period without clear cause.

How Lymphoma Is Diagnosed

Diagnosis requires more than a blood test. The cornerstone of lymphoma diagnosis is a lymph node biopsy, in which a sample of affected tissue is examined under a microscope to identify the specific cell type and subtype involved. Additional investigations typically include:

• PET-CT, or MRI imaging to assess the extent of disease
• Bone marrow biopsy to determine whether the marrow is involved
• Blood tests including full blood count, LDH levels, and in some cases flow cytometry
• Molecular and genetic testing to guide targeted treatment selection

Accurate subtyping is essential, as the treatment approach for follicular lymphoma differs significantly from that for diffuse large B-cell lymphoma or Burkitt's lymphoma.

Lymphoma Treatment: What Modern Medicine Offers

The treatment of lymphoma has advanced dramatically over the past two decades, and many forms of the disease that were once considered incurable are now routinely treated with curative intent.

Treatment depends on the subtype, stage, and individual patient factors, but the main approaches include chemotherapy, often delivered in combination regimens; immunotherapy, particularly anti-CD20 monoclonal antibodies such as rituximab for B-cell lymphomas; targeted therapy with agents such as BTK inhibitors; radiation therapy for localised disease; and stem cell transplantation for relapsed or refractory cases.

The lymphoma survival rate varies considerably by subtype and stage. Hodgkin's lymphoma survival rates are among the best in oncology. For NHL, outcomes range from highly favourable — follicular lymphoma patients often survive for many decades — to more challenging in aggressive or refractory cases. In all cases, outcomes are significantly better when diagnosis and treatment occur at experienced oncology centres.

Lymphoma Treatment in Turkey: What International Patients Should Know

Turkey has emerged as a significant destination for international oncology patients, offering a combination of clinical expertise, modern infrastructure, and considerably lower treatment costs than Western Europe or North America — typically 50 to 70% less for comparable care. Istanbul and other major cities host JCI-accredited hospitals staffed by oncologists and hematologists trained at leading institutions worldwide. The country's geographic accessibility from Europe, the Middle East, and Central Asia makes it a practical option for patients seeking high-quality care abroad.

International patients seeking lymphoma treatment in Turkey benefit from multidisciplinary tumour boards, access to advanced diagnostics including PET-CT and next-generation sequencing, and availability of the full spectrum of treatment modalities — from standard chemoimmunotherapy to stem cell transplantation.

Comprehensive Oncology Services for International Patients at Medical Park

Medical Park is Turkey's largest private hospital group, with a dedicated oncology infrastructure that serves both domestic and international patients. The Oncology and Hematology departments at Medical Park hospitals are equipped to manage the full range of lymphoma subtypes — from indolent follicular lymphoma and cutaneous lymphoma to aggressive diffuse large B-cell lymphoma and CNS lymphoma — within a multidisciplinary framework.

International patients at Medical Park benefit from dedicated patient coordination services, English-speaking clinical and administrative staff, assistance with travel and accommodation logistics, and transparent, itemised treatment cost estimates provided prior to arrival. Diagnostic workup, pathology review, and treatment planning can often be initiated with documentation and imaging sent ahead of time, reducing the duration of in-person visits.

For patients who have already received a diagnosis abroad and are seeking a second opinion or a treatment centre, Medical Park offers the clinical depth and logistical support to make the transition straightforward. To learn more about lymphoma treatment or broader cancer care services at Medical Park, check our dedicated guide on Oncology Treatment in Turkey.