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  • Title: Squash preparation and frozen section in intraoperative diagnosis of central nervous system tumors.
    Author: Shah AB, Muzumdar GA, Chitale AR, Bhagwati SN.
    Journal: Acta Cytol; 1998; 42(5):1149-54. PubMed ID: 9755673.
    Abstract:
    OBJECTIVE: To investigate the diagnostic accuracy of squash preparation (smears) and frozen section (FS) in the rapid intraoperative diagnosis of central nervous system (CNS) tumors. STUDY DESIGN: One hundred eighty-three CNS tumors were examined over a period of 18 months (January 1995-June 1996). All these were open biopsies, and the smear interpretation was compared with FS findings and paraffin section diagnosis. RESULTS: In 183 tumors, squash preparation was satisfactory in 156 cases (85.2%), and the diagnostic accuracy was 89.7% (140/156). The accuracy of FS diagnosis was 90.4% (141/156). CONCLUSION: The squash smear preparation is a fairly accurate and reliable tool in the rapid intraoperative diagnosis of CNS tumors. The accuracy of this technique is nearly as good as that of FS (P value = .9877). With the advent of stereotactic biopsies, the pathologist may have to depend entirely upon cytologic features for a definitive diagnosis.
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