KRT19 and nasopharyngeal carcinoma: Methods: This retrospective study evaluated the immunohistochemical expression of cytokeratins CK8/18 and CK19 in 24 NK-NPC and 22 benign nasopharyngeal tissue samples collected between April 2021 and April 2024 at Hospital Canselor Tuanku Muhriz, Kuala Lumpur, Malaysia.