A case of essential hypocomplementemia is reported in an individual who for at least 7 years has shown a striking deficiency in serum complement activity, due to a depression in the level of second component of complement. There is no clinical evidence to suggest that the phenomenon has occurred secondary to any recognizable disease process. The significance of complement action and complement deficiency is discussed.

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© 1960 by American Society of Hematology, Inc.
1960
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