Practical implications of the World Health Organization Reporting System for Lymph Node, Spleen, and Thymus Cytopathology : Categories and ancillary testing for subtyping of hematolymphoid tumors on FNA biopsy cytopathology using a pattern-based approach
The objective of the recently published World Health Organization Reporting System for Lymph Node, Spleen, and Thymus Cytopathology (WHO system) is to standardize the diagnostic approach to fine-needle aspiration biopsies of hematolymphoid tissues. By categorizing specimens into five diagnostic groups—inadequate/insufficient/nondiagnostic, benign, atypical, suspicious for malignancy, and malignant
