An antiquated term that refers to a non-Hodgkin lymphoma composed of diffuse infiltrates of large, often anaplastic lymphocytes. The disease is reticulum cell sarcoma (MONDO_0009975, a Monarch Disease Ontology entry). Also known as: Reticulum cell sarcoma, histiocytic lymphoma, interdigitating cell sarcoma, large-cell Lymphomas, reticular cell sarcoma, reticulosarcoma, sarcoma of reticular cell.