Som P M, Dillon W P, Sze G, Lidov M, Biller H F, Lawson W
Department of Radiology, Mount Sinai Medical Center of CUNY, New York.
Radiology. 1989 Sep;172(3):763-6. doi: 10.1148/radiology.172.3.2772185.
Most sinonasal lesions that extend into the anterior cranial fossa are malignant tumors. However, benign inflammatory polypoid disease can also rarely be manifested in this manner. Fourteen surgically proved cases of such benign and malignant disease were studied with magnetic resonance (MR) imaging. The appearances of the benign and the malignant lesions were quite different and allowed the seven chronic polypoid lesions to be distinguished from the tumors. The benign lesions had nonhomogeneous appearances on MR images due primarily to varying degrees of free-water resorption and protein concentration. The tumors had primarily homogeneous low-to-intermediate signal intensities due to their highly cellular composition.
大多数延伸至前颅窝的鼻窦病变是恶性肿瘤。然而，良性炎性息肉样病变也很少以这种方式表现。我们对14例经手术证实的此类良恶性疾病进行了磁共振（MR）成像研究。良性和恶性病变的表现截然不同，可将7例慢性息肉样病变与肿瘤区分开来。良性病变在MR图像上表现为不均匀，主要是由于不同程度的自由水吸收和蛋白质浓度变化。肿瘤由于其高度细胞组成，主要表现为均匀的低至中等信号强度。
