Müller N L, Webb W R, Gamsu G
AJR Am J Roentgenol. 1985 Jul;145(1):15-9. doi: 10.2214/ajr.145.1.15.
Detection of subcarinal lymph node enlargement on the posteroanterior chest radiograph was assessed in 90 patients who also had computed tomography (CT). Sixty of the 90 patients had normal-sized and 30 had enlarged (greater than 15 mm diameter) subcarinal lymph nodes on CT. An abnormality in the contour of the azygoesophageal recess interface was present on plain radiographs in only 23% of patients with lymphadenopathy; increased subcarinal opacity was present in 40%. The external surface of the medial wall of the right main-stem bronchus and bronchus intermedius was visible in 87% of patients with normal-sized lymph nodes but in only 27% of patients with lymphadenopathy. CT showed that the medial wall of the right main-stem and intermediate bronchi normally is delineated laterally by air within the bronchus and medially by lung or subcarinal fat. Nonvisualization may be due to replacement of lung or fat by enlarged nodes or tumor and may be helpful in assessing patients with suspected subcarinal adenopathy.
对90例同时进行了计算机断层扫描（CT）的患者的后前位胸片上隆突下淋巴结肿大的情况进行了评估。90例患者中，60例患者的隆突下淋巴结在CT上大小正常，30例患者的隆突下淋巴结肿大（直径大于15mm）。在有淋巴结病的患者中，仅23%的患者在平片上出现奇静脉食管隐窝界面轮廓异常；40%的患者出现隆突下透亮度增加。在淋巴结大小正常的患者中，87%可见右主支气管和中间支气管内侧壁的外表面，而在有淋巴结病的患者中，只有27%可见。CT显示，右主支气管和中间支气管的内侧壁通常在外侧由支气管内的空气界定，在内侧由肺或隆突下脂肪界定。无法看到内侧壁可能是由于肿大的淋巴结或肿瘤取代了肺或脂肪，这可能有助于评估疑似隆突下腺病的患者。
