Thyroid Incidentaloma Detected by Time-Resolved Magnetic Resonance Angiography at 3T: Prevalence and Clinical Significance.
10.3348/kjr.2012.13.3.275
- Author:
Nami CHOI
1
;
Won Jin MOON
;
Hahn Young KIM
;
Hong Gee ROH
;
Jin Woo CHOI
Author Information
1. Department of Radiology, Konkuk University Medical Center, Konkuk University School of Medicine, Seoul 143-914, Korea. mdmoonwj@naver.com
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Magnetic resonance angiography;
ime-resolved;
Ultrasonography;
Thyroid;
Neoplasm;
Incidentaloma
- MeSH:
Adult;
Aged;
Aged, 80 and over;
Contrast Media/diagnostic use;
Female;
Humans;
Incidental Findings;
Magnetic Resonance Angiography/*methods;
Male;
Middle Aged;
Organometallic Compounds/diagnostic use;
Prevalence;
Retrospective Studies;
Thyroid Neoplasms/*diagnosis/epidemiology/ultrasonography;
Thyroid Nodule/*diagnosis/epidemiology/ultrasonography
- From:Korean Journal of Radiology
2012;13(3):275-282
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: To determine the prevalence of thyroid incidentalomas detected by time-resolved magnetic resonance angiography (TRMRA) and to evaluate their clinical significance by using an ultrasonographic (US) and cytologic correlation. MATERIALS AND METHODS: We retrospectively reviewed 2010 consecutive TRMRA examinations performed at our institution between August 2006 and April 2010. The TRMRA findings of thyroid incidentalomas were analyzed according to location, size, as well as vascularity, and were correlated with the US findings and cytologic results. Each nodule was classified as suspiciously malignant, indeterminate or probably benign according to the US criteria recommended by the Korean Society of Thyroid Radiology. RESULTS: A total of 102 incidentalomas were detected in 90 of 2010 patients (5%). TRMRA showed homogenous hypervascularity in 48 (47%), inhomogeneous hypervascularity in 46 (45%), and hypovascularity in 8 (8%) thyroid nodules. At follow-up study, out of 26 patients with 30 incidentalomas on TRMRA, 27 nodules were identified on US. Of the 27 nodules, 24 (89%) nodule were classified as indeterminate, two (7%) as probably benign, and one (4%) as suspiciously malignant. Among the 16 nodules with available cytopathologic results, 14 (82%) were benign, one (6%) was indeterminate, and one (6%) was malignant. CONCLUSION: Thyroid incidentalomas are found in 5% of TRMRA examinations. Although their presence does not necessarily indicate malignancy, nonspecific findings of detected incidentalomas on TRMRA require further evaluation by US.
