thyroid nodule cytopathology
Microscopic examination and classification of thyroid nodule cells obtained through fine needle aspiration biopsy.
Full Definition
Thyroid nodule cytopathology involves the microscopic analysis of cellular samples obtained via fine needle aspiration (FNA) to determine the risk of malignancy in thyroid nodules. The examination assesses cellular architecture, nuclear features, and cytoplasmic characteristics according to established classification systems. Cytopathologists evaluate features such as nuclear enlargement, nuclear grooves, intranuclear pseudoinclusions, and cellular crowding to distinguish benign from malignant lesions. The interpretation directly influences surgical decision-making, with certain cytologic patterns indicating need for molecular testing or immediate surgical intervention. Quality specimens require adequate cellularity and proper preparation techniques.
Usage
Usage note: Often used interchangeably with 'FNA cytology' but emphasizes the interpretive aspect.
In Context
- "Thyroid nodule cytopathology revealed follicular cells with nuclear enlargement and grooves, suspicious for papillary thyroid carcinoma." — pathology report
- "The cytopathology specimen was deemed inadequate for diagnosis due to insufficient cellularity and excessive blood contamination." — pathology report