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This article discusses the importance of lymph node cytopathology in diagnosing various conditions, such as benign conditions, metastatic neoplasms, and recurrent malignancies. The World Health Organization (WHO) has developed a reporting system for lymph node cytopathology to standardize the reporting process and improve patient management. The system includes five major reporting categories, each with specific definitions and examples. The article emphasizes the need for appropriate ancillary techniques and clinical-pathologic correlation to ensure accurate diagnoses and optimal patient care. The text also highlights the challenges in diagnosing lymphoma and hematologic neoplasms using fine-needle aspiration (FNA) and the importance of using a multiparameter approach with ancillary testing. Overall, the WHO Reporting System for Lymph Node, Spleen, and Thymus Cytopathology aims to standardize reporting for optimal patient care. [Extracted from the article]