| Summary: | <p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 200%; text-align: justify; mso-layout-grid-align: none;"><span style="font-size: small;"><span style="font-family: Times New Roman;"><strong style="mso-bidi-font-weight: normal;"><span style="mso-ansi-language: EN-US;" lang="EN-US">Background</span></strong><span style="mso-ansi-language: EN-US;" lang="EN-US">:<em style="mso-bidi-font-style: normal;"> Echinococcosis</em> is a near-cosmopolitan zoonosis caused by adult or larval stages of tapeworms (cestodes) into the genus <em>Echinococcus </em>(family Taeniidae). It was demonstrated that platelets were capable of killing parasites independent from leukocytes<strong>. Purpose: </strong><span style="mso-bidi-font-weight: bold;">The aim of<strong> </strong>o</span>ur study was to examine mean platelet volume (MPV), platelet mass (PM) and platelet count (PC), which are practical indicators of platelet activity in preoperative and postoperative periods of the patients with hydatid cyst. </span></span></span></p><p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 200%; text-align: justify;"><span style="font-size: small;"><span style="font-family: Times New Roman;"><strong style="mso-bidi-font-weight: normal;"><span style="mso-ansi-language: EN-US;" lang="EN-US">Methods</span></strong><span style="mso-ansi-language: EN-US;" lang="EN-US">: In this retrospective study we evaluated 72 patients admitted to clinic of chest surgery with a diagnosis of pulmonary hydatid cyst in our hospital between January, 2006, and October, 2008. The MPV, PC, and PM were evaluated by complete blood count. PM was calculated by multiplying MPV and PLT.</span></span></span></p><p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 200%; text-align: justify;"><span style="font-size: small;"><span style="font-family: Times New Roman;"><strong style="mso-bidi-font-weight: normal;"><span style="mso-ansi-language: EN-US;" lang="EN-US">Results</span></strong><span style="mso-ansi-language: EN-US;" lang="EN-US">: Preoperative MPV values (mean: 8.07, std. dev.: 0.83) of the patients was found to be significantly higher than postoperative MPV values (mean: 7.78, std. dev.: 0.87) (p= 0,002). Preoperative PM values (median: 2456.75, min-max: 1013.70-5046.60) was found to be higher when compared to postoperative PM values (median: 2280.80, min-max: 134.20-4042.60) (p= 0,039). PC values were not significantly different between two periods (Preoperative PC mean values: 320.48, std. dev.: 98.42 and postoperative PC mean values: 307.29, std. dev.: 96.45, p= 0.286).</span></span></span></p><p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 200%; text-align: justify;"><span style="font-size: small;"><span style="font-family: Times New Roman;"><strong style="mso-bidi-font-weight: normal;"><span style="mso-ansi-language: EN-US;" lang="EN-US">Conclusion</span></strong><span style="mso-ansi-language: EN-US;" lang="EN-US">: In this study, we demonstrated that there were no statistical difference in PC for both periods but, in preoperative period MPV and PM were found statistical higher than postoperative period. We suggest that MPV and PM may be considered as inflammatory markers for hydatid cyst. MPV and PM can be used for following of patients with hydatid cyst</span><span style="mso-ansi-language: EN-CA;" lang="EN-CA">.</span></span></span></p>
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