Chylous ascites related to Mycobacterium avium complex (MAC) in HIV-infected patients is rare, with only six cases reported in the English literature. We report a series of six cases from a single institution. During the past six years, chylous ascites was diagnosed in six (35%) of 17 AIDS patients, all of whom had previously been diagnosed with intra-abdominal MAC immune reconstitution syndrome (MAC-IRS). A review of medical records identified no other cases of chylous ascites among HIV-positive patients over the past 13 years (1994-2007), and the incidence was estimated at one in 2248 HIV-positive admissions. The ascitic fluid had a milky appearance and a median triglyceride level of 4.07 mmol/L (range 3.19-29.6 mmol/L) (360 mg/dL, range 282-2620 mg/dL). After a median follow-up of 20 months, five (83%) of six patients survived. Chylous ascites is a late complication of intra-abdominal MAC-IRS, and is usually associated with a favourable prognosis.
Based on performance characteristics, the Vancouver General Hospital's current method of antigenemia testing to guide pre-emptive ganciclovir therapy in SOT patients is not optimal for the early detection of disease. Further study is needed on new molecular testing methods to determine if our ability to predict CMV disease can be improved.
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