Yousem D M, Fellows D W, Kennedy D W, Bolger W E, Kashima H, Zinreich S J
Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia 19104.
Radiology. 1992 Nov;185(2):501-5. doi: 10.1148/radiology.185.2.1410362.
The authors examined the magnetic resonance (MR) appearance of inverted papillomas to determine if this histologically benign lesion could be distinguished from malignancies of the sinonasal cavity. MR images in 10 patients with histologically proved inverted papilloma were retrospectively reviewed. The signal intensity of inverted papillomas on short repetition time (TR) images was iso- to slightly hypertintense to muscle in all 10 patients. Inverted papillomas had intermediate signal intensity on the long TR/echo time (TE) images. The tumors were iso- or slightly hypointense to fat on long TR/short TE images. In the seven patients who received gadopentetate dimeglumine, all inverted papillomas showed solid inhomogeneous enhancement. A review of eight sinonasal malignancies showed no distinctive signal intensity or enhancement characteristics to help differentiate inverted papillomas from various malignant tumors. The authors conclude that there is no signature MR appearance for the benign inverted papilloma. The main utility of MR imaging is in defining the extent of the lesion.
作者研究了内翻性乳头状瘤的磁共振（MR）表现，以确定这种组织学上的良性病变是否可与鼻腔鼻窦恶性肿瘤相鉴别。对10例经组织学证实为内翻性乳头状瘤患者的MR图像进行了回顾性分析。10例患者中，内翻性乳头状瘤在短重复时间（TR）图像上的信号强度与肌肉等信号或略高于肌肉信号。内翻性乳头状瘤在长TR/回波时间（TE）图像上呈中等信号强度。在长TR/短TE图像上，肿瘤与脂肪等信号或略低信号。在接受钆喷酸葡胺检查的7例患者中，所有内翻性乳头状瘤均表现为实性不均匀强化。对8例鼻腔鼻窦恶性肿瘤的回顾显示，没有独特的信号强度或强化特征有助于将内翻性乳头状瘤与各种恶性肿瘤区分开来。作者得出结论，良性内翻性乳头状瘤没有典型的MR表现。MR成像的主要作用在于确定病变范围。
