CT and MR imaging findings of sinonasal angiomatous polyps.
OBJECTIVE
To characterize the CT and MR imaging findings of patients with sinonasal angiomatous polyps (SAPs) and evaluate their respective clinical value in the diagnosis of SAP.


METHODS
CT and MR imaging findings of 15 patients with pathologically proven SAP were examined. Assessed image features included location, size, margin, attenuation, and change of the bony walls of the sinonasal cavity on CT, and signal intensity and enhancement pattern on MR.


RESULTS
On CT, the SAP was mostly isoattenuated with patches of slight hyperattenuation. Most lesions caused changes in the adjacent bone, including expansile remodeling (n=8), defect or destruction (n=7), and hyperostosis (n=6). All lesions examined by MR showed heterogeneous isointense signal intensity on T1-weighted images and mixed obvious hyperintense and hypointense signal intensity with linear hypointense septum internally (n=10), and hypointense peripheral rim on T2-weighted images (n=10). Postcontrast MR images demonstrated areas of heterogeneous and marked enhancement with an unenhanced hypointense rim and septa (n=7).


CONCLUSIONS
CT and MR imaging have respective advantages in the diagnosis of SAP. Combined application of CT and MR examinations is necessary for patients with suspected SAP.
['Zou|Jing|J|', 'Man|Fengyuan|F|', 'Deng|Kai|K|', 'Zheng|Yuanyuan|Y|', 'Hao|Dapeng|D|', 'Xu|Wenjian|W|']
D000293:Adolescent D000328:Adult D000368:Aged D000369:Aged, 80 and over D002648:Child D005260:Female D006391:Hemangioma D006801:Humans D008279:Magnetic Resonance Imaging D008297:Male D008875:Middle Aged D064847:Multimodal Imaging D010255:Paranasal Sinus Neoplasms D011127:Polyps D015203:Reproducibility of Results D012680:Sensitivity and Specificity D014057:Tomography, X-Ray Computed D055815:Young Adult
Hemangioma Magnetic resonance imaging Nasal polyps Paranasal sinus diseases Tomography, X-ray computed