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lüll Mucoid impactions: finger-in-glove sign and other CT and radiographic features Martinez S; Heyneman LE; McAdams HP; Rossi SE; Restrepo CS; Eraso ARadiographics 2008[Sep]; 28 (5): 1369-82Mucoid impaction is a relatively common finding at chest radiography and computed tomography (CT). Both congenital and acquired abnormalities may cause mucoid impaction of the large airways that often manifests as tubular opacities known as the finger-in-glove sign. The congenital conditions in which this sign most often appears are segmental bronchial atresia and cystic fibrosis. The sign also may be observed in many acquired conditions, include inflammatory and infectious diseases (allergic bronchopulmonary aspergillosis, broncholithiasis, and foreign body aspiration), benign neoplastic processes (bronchial hamartoma, lipoma, and papillomatosis), and malignancies (bronchogenic carcinoma, carcinoid tumor, and metastases). To point to the correct diagnosis, the radiologist must be familiar with the key radiographic and CT features that enable differentiation among the various likely causes. CT is more useful than chest radiography for differentiating between mucoid impaction and other disease processes, such as arteriovenous malformation, and for directing further diagnostic evaluation. In addition, knowledge of the patient's medical history, clinical symptoms and signs, and predisposing factors is important.|Adult[MESH]|Bronchial Diseases/*complications/*diagnosis[MESH]|Female[MESH]|Humans[MESH]|Male[MESH]|Middle Aged[MESH]|Mucus/*diagnostic imaging[MESH]|Radiography, Thoracic/*methods[MESH]|Tomography, X-Ray Computed/*methods[MESH]|Young Adult[MESH] |