Supplementary Material for: Chromosomal abnormalities as a predisposition to secondary neurolymphomatosis in patients with diffuse large B-cell lymphoma: A report of two cases and a literature review

Introduction: Neurolymphomatosis (NL) is a rare condition characterized by the infiltration of malignant lymphoma cells into the peripheral nervous system. The optimal treatment for NL remains unclear, and patients with secondary NL have a poor prognosis. Although early recognition of NL may contribute to successful treatment, the predictive factors for secondary NL are yet to be established. Case Presentation: Here, we present our investigation on the predictive factors for secondary NL, and report two cases of secondary NL with a literature review. We analyzed chromosomal abnormalities in patients with secondary NL and found a common deletion of chromosome 10 and add(11)(p11). The chromosomal abnormalities might be a predictive factor for secondary NL, therefore confirmation of chromosomal abnormalities can possibly give a hint for early detect of secondary NL. Prompt histopathological examination or imaging techniques can lead to early diagnosis of secondary NL in patients with diffuse large B-cell lymphoma (DLBCL). Conclusion: When neurological symptoms manifest in patients with DLBCL and there are chromosomal abnormalities, the possible development of secondary NL should be considered.