Laboratorians have used various techniques to concentrate cells in an increasing number and variety of cytologic specimens. These techniques include cytospins, filters, and cell blocks. We describe a technique in which cells are effectively concentrated from effusion and fine-needle aspirate samples by sedimenting the cell pellet into a small collodion bag. Laboratorians can obtain a sufficient amount of undiluted specimen by placing these bags in a routine histology cassette.
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Fahey et al. (1993) studied this question.
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