摘要
目的：分析并探讨婴幼儿腮腺血管瘤（PHS）的MRI及CT表现。方法：回顾性分析经手术病理证实的21例婴幼儿PHS的MRI（9/21）、CT（12/21）和临床资料。结果：21例PHS患者中男10例，女11例，1岁以内18例（86%），超过1岁者3例（14%）。影像上均表现为单发病灶，病灶中心均位于腮腺浅叶，累及深叶者9例（43%）；形态上呈类圆形6例（29%），分叶状15例（71%），所有病灶边缘清楚。12例CT检查结果示所有病灶密度均匀，CT值约（36.4±5.9） HU，病灶内未见液化坏死区，1例行增强CT检查示病灶明显均匀强化，增强后CT值由36 HU增至147 HU。9例MRI检查结果示病灶信号和咬肌相比，病灶在快速自旋回波（FSE）T1WI 显示均为等信号；FSE T2WI 及T2WI脂肪抑制序列呈明显不均匀高信号，所有病灶内均显示静脉流空的信号影，2例增强检查示明显强化，强化程度与正常脂肪信号相似。2例误诊为淋巴瘤（10%），1例误诊为混合瘤（5%），12例笼统诊断为良性肿瘤（57%），余6例均正确诊断为血管瘤（28%）。结论：婴幼儿发现位于腮区具有良性肿瘤病灶特征的包块，且病灶较大时突出于腮腺表面，增强后明显强化，诊断时应首先考虑血管瘤可能。
Abstract
Objective: To analyze the MRI and CT features of parotid hemangiomas(PHS) in infants and young children. Methods: MRI(9/21) and CT(12/21) features and clinical data of 21 cases of PHS were analyzed retrospectively, all cases were proved by pathology. Results: In the 21 cases of PHS, 10 were male, and 11 were female. 18 cases(86%) less than 1 year old, 3 cases(14%) were older than 1 year old. Images of all these cases showed a single lesion with sharp edge, the centers of these were located in the superficial lobe of the parotid; 9(43%) lesions involved the deep lobe, 6 lesions were oval(29%) and 15(71%) lobulated. CT findings showed that the lesions were homogeneous in density with CT value of (36.4±5.9) HU; all lesions had no liquefied necrotic area. The lesion was markedly enhanced on contrast enhanced CT (from 36 HU to 147 HU). Nine cases had MRI, FSE T1WI presented isointense signal compared to masseter muscle; FSE T2WI and fat suppression sequences presented a heterogeneous high signal; all lesions presented venous flow void signal; enhanced examination showed significant enhancement. Two cases were misdiagnosed as lymphoma; 1 was misdiagnosed as pleomorphic adenoma; 12 cases were generally diagnosed as benign masses; 6 cases were correctly diagnosed as hemangioma. Conclusion: If a lesion located in the parotid gland with benign characteristics found in infants and protruded out of the surface of the parotid gland when it grew larger and was significantly enhanced on contrast enhanced examination, the most probable diagnosis should be hemangioma.
关键词
腮腺肿瘤 /
血管瘤 /
磁共振成像 /
体层摄影术 /
螺旋计算机
Key words
Parotid neoplasms /
Hemangioma /
Magnetic resonance imaging /
Tomography /
spiral computed
次旦旺久;艾熙婷;卢再鸣.
婴幼儿腮腺血管瘤的MRI及CT表现[J]. 中国临床医学影像杂志. 2013, 24(6): 389-392
CIDAN Wang-jiu;AI Xi-ting;LU Zai-ming.
MRI and CT findings of parotid hemangiomas in infants and young children[J]. Journal of China Clinic Medical Imaging. 2013, 24(6): 389-392
中图分类号：
Ｒ739.87
Ｒ445.2
Ｒ814.42
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