A rare case of nodular lymphocyte predominant Hodgkin lymphoma, which developed 5 years after successful treatment of diffuse large B-cell lymphoma

Nodular lymphocyte predominant Hodgkin lymphoma (NLHLP) – B-cell lymphoma, which has been historically added to the group of Hodgkin's lymphomas, despite the peculiarities of the clinical course, treatment and prognosis, as well as morphological and immunophenotypical differences. In 75% of cases, the disease is detected at early stages (I–II according to Ann Arbor classification), has an indolent course and a favorable prognosis with 10-years an overall survival rate, more than 80%. Despite this, with long-term follow-up and the development of frequent relapses, transformation into diffuse large-cell B-cell lymphoma (DCBCL) or T-lymphocyte/histiocyte-rich DCBCL can occur, isolated cases in children. In the world literature, there are isolated cases of the development of NLHLP after treatment of DCBKL in adults, while among the pediatric population, cases have not been described. This article presents a clinical case of DCBKL in a 10-year-old child who, 5 years after the end of treatment, developed nodular Hodgkin's lymphoma with lymphocytic predominance. The patient's parents agreed to use the information, including the child's photo, in scientific research and publications.