Pseudochylothorax is a rare cause of pleural effusion. Sometimes confounded with chylothorax, firm diagnosis relies on analysis of the pleural liquid: exudative liquid (protein >30 g/L, lactate dehydrogenase >200 UI/L) with a high level of cholesterol (usually >200 mg/dL), low level of triglyceride (usually <110 mg/dL), cholesterol total/triglyceride ratio >1, absence of chylomicron, and in some cases the presence of cholesterol crystals. Pseudochylothorax is secondary to tuberculosis and rheumatoid arthritis in nearly 90% of cases. Its oncologic etiologies are mainly represented by malignant hematologic disorders.
Pseudochylothorax: An unusual mode of revelation of pleural metastasis from solid tumor / Streit, Arthur; Guerrera, Francesco; Kouki, Matthieu; Siat, Joelle; Lyberis, Paraskevas; Filosso, Pier Luigi; Renaud, Stéphane. - In: TUMORI. - ISSN 0300-8916. - Epub ahead of print:_(2018), pp. 1-5. [10.1177/0300891618791956]
Pseudochylothorax: An unusual mode of revelation of pleural metastasis from solid tumor
Filosso, Pier Luigi;
2018
Abstract
Pseudochylothorax is a rare cause of pleural effusion. Sometimes confounded with chylothorax, firm diagnosis relies on analysis of the pleural liquid: exudative liquid (protein >30 g/L, lactate dehydrogenase >200 UI/L) with a high level of cholesterol (usually >200 mg/dL), low level of triglyceride (usually <110 mg/dL), cholesterol total/triglyceride ratio >1, absence of chylomicron, and in some cases the presence of cholesterol crystals. Pseudochylothorax is secondary to tuberculosis and rheumatoid arthritis in nearly 90% of cases. Its oncologic etiologies are mainly represented by malignant hematologic disorders.
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