|Cutaneous T cell lymphoma|
|Micrograph showing cutaneous T-cell lymphoma. H&E stain.|
|Specialty||Hematology and oncology|
Cutaneous T cell lymphoma (CTCL) is a class of non-Hodgkin lymphoma, which is a type of cancer of the immune system. Unlike most non-Hodgkin lymphomas (which are generally B cell related), CTCL is caused by a mutation of T cells. The cancerous T cells in the body initially migrate to the skin, causing various lesions to appear. These lesions change shape as the disease progresses, typically beginning as what appears to be a rash which can be very itchy and eventually forming plaques and tumors before spreading to other parts of the body.
Signs and symptoms
The presentation depends if it is mycosis fungoides or Sézary syndrome, the most common, though not the only types. Among the symptoms for the aforementioned types are: enlarged lymph nodes, an enlarged liver and spleen, and non-specific dermatitis.
The cause of CTCL is unknown.
A point-based algorithm for the diagnosis for early forms of cutaneous T cell lymphoma was proposed by The International Society for Cutaneous Lymphomas in 2005.
Cutaneous T-cell lymphoma may be divided into the several subtypes.:727–740 Mycosis fungoides is the most common form of CTCL and is responsible for half of all cases.A WHO-EORTC classification has been developed.
- Pagetoid reticulosis
- Sézary syndrome
- Granulomatous slack skin
- Lymphomatoid papulosis
- Pityriasis lichenoides chronica
- Pityriasis lichenoides et varioliformis acuta
- CD30+ cutaneous T-cell lymphoma
- Secondary cutaneous CD30+ large cell lymphoma
- Non-mycosis fungoides CD30− cutaneous large T-cell lymphoma
- Pleomorphic T-cell lymphoma
- Lennert lymphoma
- Subcutaneous T-cell lymphoma
- Angiocentric lymphoma
- Blastic NK-cell lymphoma
There is no cure for CTCL, but there are a variety of treatment options available and some CTCL patients are able to live normal lives with this cancer, although symptoms can be debilitating and painful, even in earlier stages. FDA approved treatments include the following:
- (1999) Denileukin diftitox (Ontak)
- (2000) Bexarotene (Targretin) a retinoid
- (2006) Vorinostat (Zolinza) a hydroxymate histone deacetylase (HDAC) inhibitor
- (2009) Romidepsin (Istodax) a cyclic peptide histone deacetylase (HDAC) inhibitor
- (2018) Poteligeo (mogamulizumab-kpkc)
Histone deacetylase (HDAC) inhibitors are shown to have antiproliferative and cytotoxic properties against CTCL.Other (off label) treatments include:
- Topical and oral corticosteroids
- Bexarotene (Targretin) gel and capsules
- Carmustine (BCNU, a nitrosourea)
- Mechlorethamine (Nitrogen Mustard)
- Phototherapy (Broad & Narrow Band UVB or PUVA)
- Local and Total Skin Electron Therapy (TSET)
- Conventional Radiation Therapy
- Alemtuzumab (Campath-1H)
- Pentostatin and other purine analogues (Fludarabine, 2-deoxychloroadenosine)
- Liposomal doxorubicin (Doxil)
- Gemcitabine (Gemzar)
- Bone marrow / stem cells
- Allogenic transplantation
- Forodesine (Inhibits Purine Nucleoside phosphorylase)
In 2010, the U.S. Food and Drug Administration granted orphan drug designation for a topical treatment for pruritus in cutaneous T-cell lymphoma to a pharmaceutical company called Elorac.
Of all cancers involving the same class of blood cell, 2% of cases are cutaneous T cell lymphomas. CTCL is more common in men and in African-American people. The incidence of CTCL in men is 1.6 times higher than in women.
There is some evidence of a relationship with human T-lymphotropic virus (HTLV) with the adult T-cell leukemia/lymphoma subtype. No definitive link between any viral infection or environmental factor has been definitely shown with other CTCL subtypes.
- "Cutaneous T-Cell Lymphoma: Practice Essentials, Background, Pathophysiology". 2016-06-02. Cite journal requires
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- Khamaysi, Z.; Ben-Arieh, Y.; Izhak, OB.; Epelbaum, R.; Dann, EJ.; Bergman, R. (Feb 2008). "The applicability of the new WHO-EORTC classification of primary cutaneous lymphomas to a single referral center". Am J Dermatopathol. 30 (1): 37–44. doi:10.1097/DAD.0b013e31815f9841. PMID 18212543.
- Devata, S; Wilcox, RA (June 2016). "Cutaneous T-Cell Lymphoma: A Review with a Focus on Targeted Agents". American Journal of Clinical Dermatology (Review). 17 (3): 225–37. doi:10.1007/s40257-016-0177-5. PMID 26923912.
- Beigi, Pooya Khan Mohammad (2017). "Treatment". Clinician's Guide to Mycosis Fungoides. Springer International Publishing. pp. 23–34. doi:10.1007/978-3-319-47907-1_6. ISBN 9783319479064.
- Elorac, Inc. Announces Orphan Drug Designation for Novel Topical Treatment for Pruritus in Cutaneous T-cell Lymphoma (CTCL) Archived 2010-12-30 at the Wayback Machine website
- Turgeon, Mary Louise (2005). Clinical hematology: theory and procedures. Hagerstown, MD: Lippincott Williams & Wilkins. p. 283. ISBN 978-0-7817-5007-3.
Frequency of lymphoid neoplasms. (Source: Modified from WHO Blue Book on Tumour of Hematopoietic and Lymphoid Tissues. 2001, p. 2001.)