Cohen M D, Weber T R, Sequeira F W, Vane D W, King H
Radiology. 1983 Mar;146(3):691-2. doi: 10.1148/radiology.146.3.6828683.
Extension of the normal thymus into the posterior mediastinum is rare. The CT appearance of this anomaly in an infant is presented. A mass of soft-tissue density extended from the anterior mediastinum to the posterior chest wall. The absence of any tissue-cleavage plane in the lesion and a smooth continuous lateral margin are signs of posterior extension of the thymus, and they help to distinguish this from a normal anterior thymus being present with a posterior tumor.
正常胸腺延伸至后纵隔的情况较为罕见。本文展示了一名婴儿这种异常情况的CT表现。一团软组织密度影从前纵隔延伸至后胸壁。病变中无任何组织分界平面且外侧边缘光滑连续是胸腺向后延伸的征象，它们有助于将这种情况与存在后位肿瘤时的正常前位胸腺相鉴别。
