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Investigating the Effect of Thyroid Nodule Location on the Risk of Thyroid Cancer.

ABSTRACT: Background: Thyroid nodules are routinely evaluated with ultrasound. Our aim was to determine if thyroid nodule location was a useful feature to predict thyroid cancer. Materials and Methods: Retrospective review of patients with thyroid nodules from six referral centers from 2006 to 2010. A total of 3313 adult patients with thyroid nodules and confirmed benign or malignant thyroid diagnoses were included. Results: Mean patient age was 54.2 (18-97) years, and the majority were women (n?=?2635, 79.8%). A total of 3241 nodules were analyzed, 335 (10.3%) of which were malignant. Thyroid nodule location was an independent risk factor in predicting thyroid cancer (p?=?0.005). Thyroid cancer odds were highest in the isthmus (odds ratio [OR]?=?2.4, 95% confidence interval [CI] 1.6-3.6, p?

SUBMITTER: Jasim S

PROVIDER: S-EPMC7074921 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature

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Investigating the Effect of Thyroid Nodule Location on the Risk of Thyroid Cancer.

Jasim Sina S Baranski Thomas J TJ Teefey Sharlene A SA Middleton William D WD

Thyroid : official journal of the American Thyroid Association 20200128 3

Background: Thyroid nodules are routinely evaluated with ultrasound. Our aim was to determine if thyroid nodule location was a useful feature to predict thyroid cancer. Materials and Methods: Retrospective review of patients with thyroid nodules from six referral centers from 2006 to 2010. A total of 3313 adult patients with thyroid nodules and confirmed benign or malignant thyroid diagnoses were included. Results: Mean patient age was 54.2 (18-97) years ...[more]

PMID: 31910102

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Project description:BackgroundSince its inception, the Bethesda System for Reporting Thyroid Cytopathology (TBS) has been widely adopted. Each category conveys a risk of malignancy and recommended next steps, though it is unclear if each category also predicts the type and extent of malignancy. If so, this would greatly expand the utility of the TBS by providing prognostic information in addition to baseline cancer risk.MethodsAll patients prospectively enrolled into the authors' thyroid nodule database from 1995 to 2013 with histologically proven malignancy were analyzed. The primary ultrasound-guided fine-needle aspiration cytology (AUS, atypia of unknown significance; FN, follicular neoplasm; SUSP, suspicious; M, malignant) was correlated with the type of thyroid cancer and histological features known to impact prognosis and recurrence, including lymph node metastasis (LNM), lymphovascular invasion, and extrathyroidal extension (ETE). Primary cytology was separately correlated with higher risk malignancy.ResultsA total of 1291 malignancies were identified, with primary cytology AUS in 130 cases, FN in 241 cases, SUSP in 411 cases, and M in 509 cases. AUS, SUSP, and M cytology were progressively associated with an increasing risk of high-risk disease (p?<?0.001), LNM (p?<?0.001), ETE (p?<?0.001), and margin positivity (p?<?0.001). Notably, 71% of malignancies with AUS cytology were follicular variants of papillary thyroid cancer compared with 63% with SUSP cytology and only 20% with M cytology. In contrast, high-risk malignancies were diagnosed in only 4% with AUS cytology, but 9% and 27% with SUSP and M cytology, respectively. FN conveyed a significantly increased risk of follicular thyroid carcinoma compared with all other types (28% vs. 2%; p?<?0.001). A composite endpoint of recurrence, distant metastases, and death similarly increased as cytology progressed from AUS to SUSP to M (p?<?0.001).ConclusionIn addition to predicting cancer prevalence, the TBS also imparts important prognostic information about cancer type, variant, and risk of recurrence. These data extend the utility of TBS classification by fostering an improved understanding of the risk posed by any confirmed malignancy.

Dataset Information

Investigating the Effect of Thyroid Nodule Location on the Risk of Thyroid Cancer.

Publications

Investigating the Effect of Thyroid Nodule Location on the Risk of Thyroid Cancer.

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