Abstract
When approaching pleural diseases the first step is to correctly determine whether the pathological finding has a pleural or extrapleural origin. This discrimination could be challenging since pleural diseases may have an intraparenchymal extension and vice versa. A simple diagnostic sign to correctly identify the anatomical characteristics of the expanding mass consists into studying the angle formed with the surface of origin. When at the lesion base the angle is obtuse, it originates from the pleural plane; instead, if the angle is acute, it arises from the lung parenchyma and infiltrates or contacts the pleura only later (Fig. 10.1).
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Noce, V., Ammendola, R.M. (2020). Pleural Diseases. In: Carbone, I., Anzidei, M. (eds) Thoracic Radiology . Springer, Cham. https://doi.org/10.1007/978-3-030-35765-8_10
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DOI: https://doi.org/10.1007/978-3-030-35765-8_10
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