Focal dependent pleural thickening at MDCT: Pleural lesion or functional abnormality? - 19/05/12
, C. Beigelman-Aubry a
Corresponding author. Service de radiologie polyvalente, diagnostique et interventionnelle, hôpital Pitié-Salpêtrière, 47/83, boulevard de l’Hôpital, 75651 Paris cedex 13, France.
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Abstract |
Purpose |
To describe the characteristics of reversible focal pleural thickenings (PTs) mimicking real plaques, that firstly suggest asbestos exposure or pleural metastasis; to propose an imaging strategy and propose an explanation for their mechanism of formation.
Patients and methods |
Retrospective review of data from 19 patients with PTs fitting the description of pleural plaques at chest computed tomography (CT) and presenting modifications (clearance or appearance) of at least one PT at an additional chest examination in prone position.
Results |
A total of 152 PTs were recorded on the first chest CT examinations with a range of two to 19 pleural opacities per patient. All PTs had a posterior distribution in the lower lobes. On the additional acquisitions, 144 PTs disappeared. Seventeen patients presented complete regression of PTs and two patients presented persistence of eight PTs.
Conclusion |
Additional low dose acquisition in prone position should be performed in all patients presenting with focal PT in a dependent and basal location. This may allow to exclude a pleural plaque in case of asbestos exposure but also a pleural metastasis in oncologic patients. These reversible dependent PTs could be related to physiological focal accumulation of lymphatic fluid in subpleural area.
El texto completo de este artículo está disponible en PDF.Keywords : CT, Pleural plaque, Pleural thickening, Pleural metastasis
Esquema
Vol 93 - N° 5
P. 360-364 - mai 2012 Regresar al número
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