Mycosis fungoides is the most common form of primary cutaneous T-cell lymphomas diagnosed in adult patients aged 55–60 years and older. However, in foreign and domestic literature there are publications on cases of mycosis fungoides in children, adolescents and young adults. Before pathomorphological verification of the diagnosis, patients are usually followed-up for a long time by a dermatovenerologist with various chronic dermatoses.
This article provides literature review and description of own authors’ clinical observations confirming the development of the onset of the disease at a younger age, including in children and adolescents, which emphasizes the importance of cancer alertness in dermatovenerologists when conducting differential diagnostics of dermatoses of unknown genesis, as well as timely assignment of pathomorphological and immunohistochemical studies of skin biopsy.

Keywords: early onset, mycosis fungoides, young people, adolescents, diagnosis, treatment