Arthritis and rheumatism 2007-Nov
Misdiagnosis of a chylous cyst as chest wall gouty tophus: a case of true pseudogout.
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Keywords
Abstract
A patient referred to us for recurrent chest wall gouty tophus, but who was determined to actually have a chylous cyst, is described herein. Chylous cysts of the neck or chest wall can be caused by thoracic duct injury. Chyle contains 4-40 gm/liter of lipids, mostly triglycerides, and these can form birefringent crystals upon drying, leading to a false diagnosis of gout.