DON GOLDENBERG, M.D.
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To the editor: The article "Rheumatoid Pericarditis" in the December 1972 issue (pp. 837-844) mentions that hemolytic complement (CH50) was measured simultaneously in serum and pericardial fluid of two patients, with CH50 levels in the pericardial fluid being 22% and 33%, respectively, of the serum levels. The analogy between corresponding values of synovial fluid CH50 and pericardial fluid CH50 with simultaneous serum CH50 was made, and it was stated that CH50 level may be of diagnostic aid in rheumatoid pericardial fluid as well as synovial fluid.
Recently we evaluated the pericardial fluid from a 24-year-old women who met the ARA
GOLDENBERG D. Pericardial-Fluid Complement. Ann Intern Med. ;78:786. doi: 10.7326/0003-4819-78-5-786_1
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Published: Ann Intern Med. 1973;78(5):786.
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