Watts Kathryn Annabelle, Watts Jubal R
Tulane University School of Medicine, 814 Louisiana Avenue, New Orleans, LA 70115, USA.
J Thorac Imaging. 2007 May;22(2):180-1. doi: 10.1097/01.rti.0000213571.09280.f8.
Angiomyolipomas are benign mesenchymal tumors consisting of blood vessels, smooth muscle, and fat. These noninvasive lesions characteristically manifest in renal tissue but may arise less frequently in extrarenal locations including the mediastinum. Only 8 cases of mediastinal angiomyolipomas have been reported in the literature, 3 of which were reported in the English literature, and only 2 of which were located in the anterior mediastinum. We report a surgically confirmed case of an anterior mediastinal angiomyolipoma incidentally discovered in an asymptomatic patient, in whom a screening breast magnetic resonance imaging revealed an incidental 5.7 cm anterior mediastinal mass. Further characterization with contrast-enhanced chest computed tomography confirmed a heterogeneously enhancing anterior mediastinal mass, suggestive of thymoma or lymphoma. The mass was resected and histopathologic evaluation revealed an angiomyolipoma.
血管平滑肌脂肪瘤是由血管、平滑肌和脂肪组成的良性间叶组织肿瘤。这些非侵袭性病变通常出现在肾组织中，但较少出现在包括纵隔在内的肾外部位。文献中仅报道了8例纵隔血管平滑肌脂肪瘤，其中3例在英文文献中有报道，且只有2例位于前纵隔。我们报告1例经手术确诊的前纵隔血管平滑肌脂肪瘤病例，该病例偶然发现于一名无症状患者，其乳腺磁共振成像筛查偶然发现一个5.7 cm的前纵隔肿块。胸部增强计算机断层扫描进一步检查证实为前纵隔不均匀强化肿块，提示胸腺瘤或淋巴瘤。该肿块被切除，组织病理学评估显示为血管平滑肌脂肪瘤。
