immune system cell quantity large unstained cell quantity 2025-08-20T15:50:25Z VT:0011220 The proportion or number of larger than normal cells which are unstained using routine blood count methodologies; large unstained cells (LUC) are larger than normal lymphocytes, and may be atypical lymphocytes, myeloperoxidase deficient cells or peroxidase negative blasts. Aberrations in the count of large unstained cells may be indicative of viral disease or leukemia. Trait.ontology