Anaplastic large-cell lymphoma
Anaplastic large-cell lymphoma (ALCL) refers to a group of non-Hodgkin lymphomas in which aberrant T cells proliferate uncontrollably. Considered as a single entity, ALCL is the most common type of peripheral lymphoma and represents ~10% of all peripheral lymphomas in children.
Source: Wikipedia — Anaplastic large-cell lymphoma (CC BY-SA 4.0)