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Lymphomas

Mycosis fungoides

Mycosis fungoides is a T-cell lymphoma that usually begins in the skin. Early disease is often treated with skin-directed therapies; a donor stem cell transplant is an option for selected advanced or difficult-to-treat cases.

Other names and abbreviations

MF · cutaneous T-cell lymphoma, mycosis-fungoides type · cutaneous T-cell lymphoma · CTCL · T-cell lymphoma · skin lymphoma · Alibert-Bazin syndrome · granuloma fungoides (historical)

Where transplant fits

Early disease usually receives skin-directed treatment. Allogeneic transplantation can offer durable remission to selected patients with advanced or refractory disease, using a suitable related, unrelated or alternative graft.

Treatment depends on the exact diagnosis, disease stage, prior treatment and the person’s health. These categories are not estimates of donor demand.

What it is

Despite its name, mycosis fungoides is not a fungal infection. It involves malignant mature T cells in the skin, often beginning as persistent patches or plaques. Skin biopsies and specialist review help distinguish it from eczema, psoriasis and other inflammatory conditions.

Some people need more than one biopsy over time before the diagnosis becomes clear. Staging assesses skin involvement together with lymph nodes, blood and internal organs. Early and advanced disease have very different treatment needs.

What causes it

The lymphoma develops through acquired changes in T cells, but its exact cause is usually unknown. It is not spread through touching the skin or sharing a household.

Mycosis fungoides is not simply caused by having a long-standing ordinary rash. Its classification depends on clinical and pathological findings, not on how long the skin has been itchy.

What it can do

Patches, thicker plaques or tumors can cause itching, discomfort or changes in appearance. Symptoms may affect sleep, clothing choices, work and confidence even when disease is limited to the skin.

Advanced disease can involve extensive skin, lymph nodes, blood or internal organs. Damaged skin and immune dysfunction can increase infection risk. Not every person with early skin disease progresses to advanced lymphoma.

How it is treated

Early treatment often acts directly on the skin, using topical corticosteroids or other medicines, phototherapy or localized radiation. Choice depends on the extent and character of the lesions and previous response.

More widespread or resistant disease may need systemic treatment, such as retinoids, interferon, targeted antibodies or other agents. Chemotherapy and clinical trials have roles in selected circumstances. The aim includes controlling symptoms and preserving quality of life as well as reducing lymphoma.

Allogeneic transplantation can offer durable remission and curative potential to selected patients with advanced disease. Because it carries substantial risks, it is not routine for early mycosis fungoides. Autologous transplantation does not provide the same donor immune effect and is not the standard transplant strategy here.

Living with the condition and treatment

Skin symptoms can require daily care over long periods. Itch treatment, wound care, infection assessment and support for sleep and emotional health are meaningful parts of care rather than minor additions.

People considering transplant need a plan for disease control beforehand and help during recovery. After transplant, changes in the skin may reflect lymphoma, infection, drug effects or graft-versus-host disease and need careful clinical evaluation.

The role of a blood stem cell donor

A registry donor is not needed for the usual skin-directed treatment. A donor becomes relevant when an allogeneic transplant is selected for advanced or refractory disease.

The team may assess relatives, unrelated registry volunteers and alternative grafts. Donor cells can provide an immune response against the lymphoma, but a suitable donor does not guarantee remission. Registry recruitment supports patients who need that selected pathway.

Treatment at a glance

Who it affects
Mycosis fungoides mainly affects adults but can occur at other ages.
Other treatment options
Early treatment often acts directly on the skin, using topical corticosteroids or other medicines, phototherapy or localized radiation. Choice depends on the extent and character of the lesions and previous response.
Cells used for transplantation
Donated blood-forming cells for allogeneic transplantation. Marrow, peripheral blood or cord blood and donor type are selected for the patient and transplant approach.

Questions to bring to your care team

What is the exact diagnosis or subtype? What is the goal of each treatment option? If transplant is being considered, why does it fit this situation, which cells would be used and what are the alternatives?

Supporting someone with a diagnosis

Sources and further reading

  1. Mycosis Fungoides (Including Sézary Syndrome) Treatment (PDQ), Patient Version
    NCI · Accessed 2026-09-05
  2. WHO fifth-edition classification: Lymphoid Neoplasms
    WHO classification authors / Leukemia · Accessed 2026-09-05
  3. Other B- and T-Aggressive Lymphomas and Lymphomas Associated with HIV
    EBMT Handbook / NCBI Bookshelf · Accessed 2026-09-05
  4. Indications for haematopoietic cell transplantation and CAR-T: 2025 EBMT practice recommendations
    EBMT / Bone Marrow Transplantation · Accessed 2026-09-05
  5. Stem Cell and Bone Marrow Transplants for Cancer
    NCI · Accessed 2026-09-05
  6. Donor and cord blood unit selection guidelines
    NMDP / CIBMTR · Accessed 2026-09-05

Understanding can become action.

Some patients need a blood stem cell donor. Others receive different treatment. Wherever your interest began, you can help JBF reach more people who may be able to donate.

Explore the official registry serving where you live. It explains who can join, how registration works and what donation involves.

Find your official registry

If joining is not right for you, a gift to the Jada Bascom Foundation supports education, outreach and referrals to official registries.

Donate to JBF

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Mycosis fungoides — condition and treatment guide | Jada Bascom Foundation