Abstract
ABSTRACT Cell blocks and fine needle aspirations can be used for cytopathological diagnosis. Conventional fine needle aspiration smears provide limited material for diagnosis. The cell block technique provides more tissue, which improves diagnostic accuracy. We compared a modified cell block cytology to fine needle aspiration for providing optimal preservation of histochemical and immunocytochemical properties. We used 30 fine needle aspirates from oral lesions in two groups: group 1, fine needle aspiration cytology; group 2, cell block cytology. Smears of fine needle aspirates were stained with Papanicolaou. For the modified cell block technique, aspirated material was centrifuged to create a cell pellet, which then was fixed with Nathan alcohol formalin substitute. After routine histopathological processing, cell pellets were embedded in paraffin, then sectioned and stained with hematoxylin and eosin. Sections were compared to Papanicolaou stained smears of fine needle samples. Cellular morphology and staining quality of modified cell block samples were superior to fine needle aspiration cytology; both methods exhibited distinct nuclear morphology. Modified cell blocks provide excellent cytopathologic features compared to fine needle aspiration cytology.
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