Pathology Research International / 2015 / Article / Tab 2

Research Article

Thyroid Cytopathology Reporting by the Bethesda System: A Two-Year Prospective Study in an Academic Institution

Table 2

Number of cases in various diagnostic categories and subcategories according to the Bethesda System for Reporting Thyroid Cytopathology (TBSRTC).

S. numberCytological categoriesSubcategoriesNumber of casesTotal number of cases in each category

Cyst fluid only16
1Nondiagnostic/unsatisfactory (ND/UNS)Virtually acellular specimen016 (7.2)
Other (obscuring blood, clotting artifact, etc.)0

Consistent with benign follicular nodule (includes adenomatoid nodule, colloid nodule, etc.)138
2BenignConsistent with lymphocytic (Hashimoto) thyroiditis in the proper clinical context36180 (80)
Consistent with granulomatous (subacute) thyroiditis02
Other 04

3Atypia of undetermined significance/follicular lesion of undetermined significance (AUS/FLUS)11 (4.9)

4Follicular neoplasm/suspicious for a follicular neoplasm (FN/SFN)5 (2.2)

Suspicious for papillary carcinoma06
Suspicious for medullary carcinoma0
5Suspicious for malignancy (SFM)Suspicious for metastatic carcinoma08 (3.6)
Suspicious for lymphoma01

Papillary thyroid carcinoma04
Poorly differentiated carcinoma0
Medullary thyroid carcinoma01
Undifferentiated (anaplastic) carcinoma0
6MalignantSquamous cell carcinoma05 (2.2)
Carcinoma with mixed features0
Metastatic carcinoma0
Non-Hodgkin lymphoma0

Total225 (100)

(1) Figures in parentheses indicate percentages.
(2) “Other” subcategory in benign category consisted of cases of chronic nonspecific abscess.
(3) “Other” subcategory in suspicious for malignancy category consisted of a case of suspicious for malignancy, not otherwise specified.

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