Related Experiment Video
Updated: Aug 9, 2026
An Orthotopic Mouse Model of Anaplastic Thyroid Carcinoma
Published on: April 17, 2013
Thyroid aspiration cytology: a "cell pattern" approach to interpretation
1Department of Pathology, Northwestern University and The Robert H. Lurie Comprehensive Cancer Center, Chicago, IL 60611, USA.
Insights
Interpreting thyroid fine needle aspiration (FNA) relies on recognizing cell patterns and background elements. This approach aids in differential diagnosis for thyroid cytology, improving accuracy.
Area of Science:
- Cytopathology
- Endocrinology
- Oncology
Background:
- Thyroid fine needle aspiration (FNA) is crucial for diagnosing thyroid nodules.
- Accurate interpretation depends on recognizing epithelial cell morphology and background elements.
- Differential diagnosis can be challenging due to overlapping cytologic features.
Purpose of the Study:
- To outline a systematic approach for interpreting thyroid FNA cytology.
- To highlight differential diagnostic challenges in thyroid aspiration cytology.
- To emphasize the role of cellular arrangement in initial diagnosis.
Main Methods:
- Analysis of morphologic patterns in thyroid FNA cytology.
- Categorization of cellular arrangements: follicular, papillary, syncytial, dispersed, and cystic.
- Integration of individual cell features and background elements for differential diagnosis.
Main Results:
- Established a framework for thyroid FNA interpretation based on cellular arrangement.
- Identified key morphologic patterns and their diagnostic significance.
- Demonstrated how to narrow differential diagnoses by assessing cellular and background features.
Conclusions:
- A structured approach focusing on cellular arrangement, individual cell features, and background elements enhances thyroid FNA interpretation.
- This method aids in overcoming differential diagnostic challenges in thyroid cytology.
- Improved diagnostic accuracy in thyroid nodule assessment through systematic cytologic evaluation.
Abstract:
The key to the interpretation of thyroid fine needle aspiration is largely dependent on the recognition of various morphologic patterns of epithelial cells, usually follicular cells, and background elements, such as colloid. These morphologic patterns consist of 3 parts: 1) The arrangement of cells with respect to one another, 2) The cytologic features of individual cells, and 3) The presence of background elements. The cellular arrangements generally encountered in fine needle aspiration of the thyroid include the follicular patterns (macro-/normo-follicular and micro-follicular), the papillary pattern, the syncytial pattern, the dispersed cell pattern, and the cystic pattern. This article approaches some of the differential diagnostic challenges encountered while interpreting thyroid aspiration cytology by focusing first on the overall cellular arrangement to generate a differential diagnosis and then narrowing that differential by assessing cellular features of individual cells and the presence of background elements.
