Radiological features of XXXX to the thyroid.

@entity1 @entity0 @entity5 @entity2 @entity1358 @entity14 @entity3 @entity980 @entity1374
BACKGROUND: Thyroid @entity3 (TM) are uncommon. Dependent on study design, the reported frequency of TM is in the range of 0.1-6% in different analyses. While clinical and histopathological features of TM were well described in the literature, radiological publications consist predominantly of isolated case reports or small series. PURPOSE: To estimate the prevalence, clinical signs, and radiological appearances of TM. MATERIAL AND METHODS: From 1997 to 2013, a total of 8849 @entity1 with various disorders of the thyroid gland were treated in our institution. In 33 @entity1 TM were diagnosed. Ultrasound (US) images were available in all @entity1 , computed tomography (CT) of the neck in 16 @entity1 , and magnetic resonance imaging (MRI) in nine @entity1 . RESULTS: Clinically, most @entity1 (85%) presented with a painless neck mass. @entity5 were @entity1358 (79%), @entity14 (12%), @entity2 (3%), @entity980 (3%), and @entity0 (3%). On US, most lesions were irregular in shape with inhomogenous texture. On CT, all TM were hypodense. On T1-weighted images, most TM were inhomogenously iso-to-hyperintense in comparison to the normal thyroid tissue, and slightly hyperintense on T2-weighted images with an inhomogenous contrast enhancement. CONCLUSION: The prevalence of TM was 0.4%. Most of the TM originated from @entity1358 . The identified radiological features of TM should be taken into consideration in the differential diagnosis of @entity1374 .
