Primary central nervous system lymphoma co-existing with ataxia–telangiectasia syndrome.

The article describes the case of a 2.5-year-old girl diagnosed with primary central nervous system lymphoma (PCNSL), a very rarely diagnosed non-Hodgkin lymphoma in children. Topics discussed include the girl's medical history, clinical characteristics of PCNSL, and confirmation of the necessity of diagnostics in children with PCNSL for congenital immunodeficiency and follow-up of patients with immunity deficits.