CD5 and laryngeal neoplasm: Postoperative immunohistochemistry (IHC) results of the laryngeal tumor were as follows: cluster of differentiation 20 (CD20) (partial +), CD79α (diffuse +), CD5 (−), CD10 (−), CyclinD1 (−), B-cell lymphoma 2 (Bcl-2) (+), Bcl-6 (−), and Epstein Barr encoding region (EBER) in situ hybridization (−).