Rare Disease Day: Why Lymphoma — Though Common — Is Still Considered a Rare Cancer

Each year on February 28^th, Rare Disease Day shines a global spotlight on conditions affecting relatively small patient populations — diseases that often struggle for public recognition, research funding, and treatment advances.

While lymphoma is one of the most common blood cancers, it is still classified as a rare disease. For lymphoma patients and families, the challenges of navigating a rare disease can add emotional and logistical strain to an already difficult experience. At the Lymphoma Research Foundation, Rare Disease Day is an opportunity to highlight both progress and the continued need for education, advocacy, and scientific investment.

What is a Rare Disease and Why Does it Matter?

According to the National Cancer Institute (NCI), a disease is considered rare if it affects fewer than 200,000 people in the United States. There are about 7,000 rare diseases, and an estimated 25 to 30 million Americans are living with a rare disease.

Rare diseases present a distinct set of challenges that can complicate every stage of the patient’s journey.

Why Lymphoma is Considered Rare

Lymphoma is one of the most common blood cancers. In fact, lymphoma is the most common type of blood cancer in adults and the third most common in children.

According to the American Cancer Society’s Cancer Facts & Figures 2026, this year, an estimated 111,000 people will be diagnosed with non-Hodgkin, Hodgkin lymphoma, and chronic lymphocytic leukemia (CLL). Therefore, statistically, it is in fact a rare disease.

Lymphoma develops in the lymphatic system—a network of lymph nodes, spleen, thymus, and bone marrow that helps regulate the immune response. Unlike solid tumors that usually begin in one organ, lymphoma is systemic, meaning it can spread and grow in many parts of the body, including the lymph nodes, spleen, bone marrow, and other organs.

Here are a few key distinctions that set lymphoma apart:

• Where it starts: Lymphoma begins in B cells, T cells, or NK cells—specialized white blood cells.
• How it spreads: Because the lymphatic system is connected throughout the body, lymphoma can appear in multiple areas, not just one organ.
• How it behaves: Each of the more than 100 subtypes of lymphoma behaves differently and affects a relatively small population, making accurate diagnosis critical to selecting the right treatment.

Why Does Lymphoma Being Rare Matter?

Lymphoma, being a rare disease, comes with several unique challenges, including:

• Limited scientific knowledge and gaps in reliable information often contribute to delayed or difficult diagnoses.
• The need for highly specialized care can create significant barriers to accessing appropriate treatment and support.
• Because rare disorders are so diverse — and frequently share symptoms with more common conditions — misdiagnosis is not uncommon, sometimes prolonging uncertainty for patients and families.
• International collaboration among researchers and clinicians is especially important, but not always simple.
• Securing funding for research in rare diseases is particularly challenging and can lead to a lack of understanding that makes curing these diseases possible.

Ultimately, all these challenges can significantly and negatively impact patients, making it critical to raise awareness and coalesce the community around shared goals that can help us gain a better understanding of lymphoma and ultimately help improve patient outcomes.

Why the Lymphoma Community Needs the Lymphoma Research Foundation

The Lymphoma Research Foundation is the nation’s largest and only lymphoma-specific nonprofit organization. Our mission is clear: to realize the promise of science to eradicate lymphoma and serve the community touched by this disease.

Our exclusive focus on lymphoma, deep clinical expertise, and decades-long track record make us not just a part of the lymphoma conversation—but the leader in it.

The Foundation is laser-focused on providing accurate information, advancing cutting-edge research, and trusted support tailored specifically for lymphoma. For patients and families navigating the complexities of this disease, that dedication matters. That is why we exist—and why our role is more critical than ever. The Foundation provides:

• Expert-reviewed education tailored specifically to lymphoma patients and care partners.
• Free support services provide the guidance, resources, and compassion needed to navigate this journey.
• Investment in research to support the careers of hundreds of scientists and drive discoveries that have transformed patients’ lives.

We stand with the lymphoma community every step of the way, offering guidance, advocacy, and connection. Whether you access our resources, learn about our impact, or join our cause by supporting the organization, we are thrilled to have you as a part of our community.