A Method for Decalcification with Citric Acid

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Abstract
Psammoma bodies and small calcifications are frequently seen in a wide variety of tissues. These deposits of calcium salts render tissues difficult to section. Conventional decalcification alters the tissues; consequently it is not advisable to decalcify tissues containing only small calcium deposits. A simple and rapid method to remove small amounts of calcium salts using citric acid alone is described. This method does not alter the antigenic properties of the substances studied.