The etiology of cervical lymphadenopathy can be divided into infectious and non-infectious. The infectious causes of cervical lymphadenopathy are: - Viral infections e.g., infectious mononucleosis, adenovirus, coxsackie virus, CMV, and herpes virus. - Bacterial infections e.g., streptococcus pyogenes and staphylococcus aureus - Atypical mycobacteria - Mycobacterium tuberculosis - Cat scratch disease Reference: https://emedicine.medscape.com/article/956340-clinical#b5 Image via: https://www.semanticscholar.org/paper/Relapse-of-leprosy-presenting-as-nodular-lymph-node-Kiran-Moorthy/667534e395a1c1cde9cbd9b64cdcb85242c34928/figure/0