The lymph node biopsy specimens from 57 non-Hodgkin lymphoma patients were assessed using immunohistochemical staining, and it was found that primary mediastinal B-cell lymphoma was the only type showing CysLT1R expression in tumor cells, while other types of lymphoma included in the study showed no CysLT1R expression [42]. The gene discussed is CYSLTR1; the disease is neoplasm.