Jones D K, Dent R G, Rimmer M J, Flower C D
Clin Radiol. 1984 Jul;35(4):307-10. doi: 10.1016/s0009-9260(84)80101-4.
The appearance of ring shadows on the chest radiograph of patients with sarcoidosis is usually associated with generalised, irreversible pulmonary fibrosis. We report three patients in whom thin-walled ring shadows appeared early in the disease. These ring shadows occurred in areas of pre-existing lung shadowing and in two patients they disappeared with corticosteroid therapy over a period of 1-2 years. We postulate that these early sarcoid ring shadows may be caused by a combination of central necrosis of areas of coalescent granulomas and a check-valve mechanism beyond partial obstruction of airways by endobronchial sarcoidosis.
结节病患者胸部X线片上出现的环形阴影通常与广泛性、不可逆的肺纤维化有关。我们报告了3例患者，其薄壁环形阴影在疾病早期出现。这些环形阴影出现在原有肺部阴影的区域，其中2例患者经皮质类固醇治疗1 - 2年后环形阴影消失。我们推测，这些早期结节病环形阴影可能是由融合性肉芽肿区域的中央坏死以及支气管内结节病导致气道部分阻塞后的单向阀机制共同引起的。
