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CT and MRI findings of sinonasal inverted papilloma
Author(s): WANG Chun-yu, CT room, the Second peoples Hospital of Fuxin
Pages: 52-
55+84
Year: 2016
Issue:
1
Journal: Anatomy Research
Keyword: Nose neoplasms; Paranasal sinus neoplasms; Papilloma; inverted; Tomography; X-ray computed; Magnetic resonance imaging;
Abstract: Objective To investigate CT and MRI findings of sinonasal inverted papilloma. Methods Seventeen patients with SNIP that were confirmed by surgery and pathology were retrospectively analyzed. All of them underwent non-contrast CT with muti-planar reformation,seven contrast-enhanced MR imaging. Results All of the 17 patients were unilateral,involving the lateral nasal wall in 2 cases,involving the nasal cavity and sinuses in 15 cases,including 1 case of malignant change. The 16 cases of benign lesions showed as strips,cauliflower,with a small wavy surface,and creeping along with the inherent structure. On CT scan,all17 lesions showed medium density,with bone displacement in 13 cases,hyperplasia in 5 cases,absorption in 3 cases,and enlargement of opening of the maxillary sinus in 5 cases. On MRI,the lesions showed medium T1 signal,medium-slightly hyper mixed T2 signal and fence-like pattern enhancement in 3 cases;medium-hypo mixed T1 signal,medium-hyper mixed T2 signal,and convoluted cerebriform pattern enhancement in 2 cases;medium T1,medium T2 and moderate enhancement in 1 case. The malignant change lesion showed spherical,lobulated,rim visible bone invasion damage,mixed signals,lack of fence-like or convoluted cerebriform pattern reinforcement. Conclusion Diffuse Creeping growth and small wavy edge is the sinonasal inverted papilloma morphological characteristics;CT shows medium density,usually with bony changes;Fence-like or convoluted cerebriform pattern on MR T2 WI or enhanced Tl WI is typical finding.
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