Sézary disease and mycosis fungoides are cutaneous T-cell lymphomas having a primary manifestation in the skin.[5] The disease's origin is a peripheral CD4+ T-lymphocyte,[3] although rarer CD8+/CD4- cases have been observed.[3] Epidermotropism (lymphocytes residing in the epidermis)[6] by neoplasticCD4+lymphocytes with the formation of Pautrier's microabscesses is the hallmark sign of the disease. Although the condition can affect people of all ages, it is commonly diagnosed in adults over age 60.[7][3] The dominant signs and symptoms of the disease are:
Atypical T cells – malignant lymphocytes known as "Sézary cells" seen in the peripheral blood with typical cerebriform nuclei (brain-shaped, convoluted nuclei)[8][3]
Those who have Sézary disease often present skin lesions that do not heal with normal medication.[12] A blood test generally reveals any change in the levels of lymphocytes in the blood, which is often associated with a cutaneous T-cell lymphoma.[12] Finally, a biopsy of a skin lesion can be performed to rule out any other causes.[12]
The immunohistochemical features are very similar to those presented in mycosis fungoides except for the following differences:[13]
More monotonous cellular infiltrates (large, clustered atypical pagetoid cells) in Sézary syndrome
Sometimes absent epidermotropism
Increased lymph node involvement with infiltrates of Sézary syndrome.
Treatments are often used in combination with phototherapy and chemotherapy, though pure chemotherapy is rarely used today.[3] No single treatment type has revealed clear-cut benefits in comparison to others, treatment for all cases remains problematic.[15]
Radiation therapy
A number of types of radiation therapy may be used including total skin electron therapy.[16] While this therapy does not generally result in systemic toxic effects it can produce side effects involving the skin.[16] It is only available at a few institutions.[16]
The FDA has approved denileukin diftitox-cxdl (Lymphir) for the treatment of patients with relapsed/refractory cutaneous T-cell lymphoma (CTCL) after at least 1 prior systemic therapy. LYMPHIR (denileukin diftitox-cxcl)
Injection 300 mcg is indicated for the treatment of adult patients with relapsed or refractory Stage I-III cutaneous T-cell lymphoma (CTCL) after at least one prior systemic therapy.[20]
Epidemiology
In the Western population, there are around 3 cases of Sézary syndrome per 1,000,000 people.[3] Sézary disease is more common in males with a ratio of 2:1,[3] and the mean age of diagnosis is between 55 and 60 years of age.[3][9]
^Cerroni, Lorenzo; Kevin Gatter; Helmut Kerl (2005). An illustrated guide to Skin Lymphomas. Malden, Massachusetts: Blackwell Publishing. p. 39. ISBN978-1-4051-1376-2.
^Martin, Stephanie J.; Duvic, Madeleine (2012-10-01). "Prevalence and treatment of palmoplantar keratoderma and tinea pedis in patients with Sézary syndrome". International Journal of Dermatology. 51 (10): 1195–1198. doi:10.1111/j.1365-4632.2011.05204.x. ISSN1365-4632. PMID22994666. S2CID44779503.
^Cerroni, Lorenzo; Kevin Gatter; Helmut Kerl (2005). An illustrated guide to Skin Lymphomas. Malden, Massachusetts: Blackwell Publishing. p. 41. ISBN978-1-4051-1376-2.
^Jawed, SI; Myskowski, PL; Horwitz, S; Moskowitz, A; Querfeld, C (February 2014). "Primary cutaneous T-cell lymphoma (mycosis fungoides and Sézary syndrome): part II. Prognosis, management, and future directions". Journal of the American Academy of Dermatology. 70 (2): 223.e1–17, quiz 240–2. doi:10.1016/j.jaad.2013.08.033. PMID24438970.