دورية أكاديمية
Enhancement patterns of adrenal nodules on magnetic resonance imaging
| العنوان: | Enhancement patterns of adrenal nodules on magnetic resonance imaging |
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| المؤلفون: | Fernando Ide Yamauchi, George Ramos Lemos, André Dubinco, Omir Antunes Paiva, Thais Caldara Mussi, Ronaldo Hueb Baroni |
| المصدر: | International Brazilian Journal of Urology, Vol 48, Iss 2, Pp 294-302 (2022) |
| بيانات النشر: | Sociedade Brasileira de Urologia, 2022. |
| سنة النشر: | 2022 |
| المجموعة: | LCC:Diseases of the genitourinary system. Urology |
| مصطلحات موضوعية: | Magnetic Resonance Imaging, Adrenal Glands, Carcinoma, Diseases of the genitourinary system. Urology, RC870-923 |
| الوصف: | ABSTRACT Objective: To compare enhancement patterns of typical adrenal adenomas, lipid-poor adenomas, and non-adenomas on magnetic resonance imaging (MRI). Materials and Methods: Evaluation of adrenal nodules larger than 1.0 cm, with at least 2-year follow-up, evaluated on MRI in January 2007 and December 2016. Two different protocols were included - upper abdomen MRI (delayed phase after 3 minutes) and abdomen and pelvis MRI (delayed phase after 7 minutes) – and nodules were divided in typical adenomas (characterized on out-of-phase MRI sequence), lipid-poor adenomas (based on follow-up imaging stability) and non-adenomas (based on pathological finding or follow-up imaging). T2-weighted and enhancement features were analyzed (absolute and relative washout and enhancement curve pattern), similarly to classic computed tomography equations. Results: Final cohort was composed of 123 nodules in 116 patients (mean diameter of 1.8 cm and mean follow up time of 4 years and 3 months). Of them, 98 (79%) nodules had features of typical adenomas by quantitative chemical shift imaging, and demonstrated type 3 curve pattern in 77%, mean absolute and relative washout of 29% and 16%, respectively. Size, oncologic history and T2-weighted features showed statistically significant differences among groups. Also, a threshold greater than 11.75% for absolute washout on MRI achieved sensitivity of 71.4% and specificity of 70.0%, in differentiating typical adenomas from non-adenomas. Conclusion: Calculating absolute washout of adrenal nodules on MRI may help identifying proportion of non-adenomas. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1677-6119 1677-5538 |
| Relation: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-55382022000200294&tlng=en; https://doaj.org/toc/1677-6119 |
| DOI: | 10.1590/s1677-5538.ibju.2021.0472 |
| URL الوصول: | https://doaj.org/article/7dab0f3ef66d4122903b089018306a92 |
| رقم الأكسشن: | edsdoj.7dab0f3ef66d4122903b089018306a92 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 16776119 16775538 |
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| DOI: | 10.1590/s1677-5538.ibju.2021.0472 |