Levine E, Wetzel L H, Neff J R
AJR Am J Roentgenol. 1986 Dec;147(6):1299-304. doi: 10.2214/ajr.147.6.1299.
Ten extrahepatic cavernous hemangiomas in seven patients were evaluated by MR and CT. MR was done with a 1.0-T superconducting magnet and spin-echo imaging. The lesions occurred in the musculoskeletal system, parotid gland, and spleen. MR and CT features of hemangiomas were compared, and MR findings in hemangiomas were also compared with those in eight musculoskeletal tumors of nonvascular origin. MR detected 10 hemangiomas, while nine were shown by CT. Also, MR was more accurate than CT in three patients in determining the true extent of hemangiomas. At a pulse-repetition interval of 2000 msec and an echo delay time of 90 msec, all hemangiomas were markedly hyperintense compared with skeletal muscle. Quantitatively, at this pulse sequence, intensity ratios of hemangiomas to skeletal muscle were all seven or greater (mean = 9.89), while the ratios for other tumors were usually less than seven (mean = 5.14). These means differed significantly (p less than .001). Small cavernous hemangiomas were homogeneous, well-defined round or oval lesions, while large hemangiomas consisted of dilated, tortuous vascular channels. Other tumors, however, were usually heterogeneous owing to hemorrhage and necrosis and had irregular margins. MR may, therefore, be useful for distinguishing cavernous hemangiomas from other soft-tissue tumors, particularly sarcomas.
对7例患者的10个肝外海绵状血管瘤进行了磁共振成像（MR）和计算机断层扫描（CT）评估。MR检查使用1.0-T超导磁体和自旋回波成像。病变发生于肌肉骨骼系统、腮腺和脾脏。比较了血管瘤的MR和CT特征，并将血管瘤的MR表现与8例非血管源性肌肉骨骼肿瘤的表现进行了对比。MR检测出10个血管瘤，而CT显示出9个。此外，在3例患者中，MR在确定血管瘤的实际范围方面比CT更准确。在脉冲重复间隔为2000毫秒、回波延迟时间为90毫秒时，与骨骼肌相比，所有血管瘤均呈明显高信号。定量分析显示，在此脉冲序列下，血管瘤与骨骼肌的强度比均为7或更高（平均值 = 9.89），而其他肿瘤的比值通常小于7（平均值 = 5.14）。这些平均值差异显著（p < 0.001）。小的海绵状血管瘤为均匀、边界清晰的圆形或椭圆形病变，而大的血管瘤由扩张、迂曲的血管通道组成。然而，其他肿瘤通常因出血和坏死而呈异质性，边缘不规则。因此，MR可能有助于将海绵状血管瘤与其他软组织肿瘤，特别是肉瘤区分开来。
