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자궁경부 이형성증과 암의 진단을 위한 액상세포 검체에서 p16<sup>INK4a</sup>/Ki-67 이중면역염색의 평가
성미희,이훈택,신민식,오서영,김욱연,Sung, Mi Hee,Lee, Hoon Taek,Shin, Min Shik,Oh, Seo Young,Kim, Wook Youn 대한임상검사과학회 2015 대한임상검사과학회지(KJCLS) Vol.47 No.3
Recently, $p16^{INK4a}$/Ki-67 dual immunostaining has been introduced as a new biomarker protocol for early detection of uterine cervical dysplasia and cancer in liquid-based cytology (LBC). We performed the $p16^{INK4a}$/Ki-67 dual immunostaining using a CINtec$^{(R)}$ PLUS kit in a total of 109 LBC cases of cervicovaginal smear and compared its results with those from LBC, HPV hybrid capture II (HC II) test and histological diagnosis. Expression of $p16^{INK4a}$ and Ki-67 was significantly associated with cases of LSIL or higher in cytological diagnosis and cases of cervical intraepithelial neoplasia (CIN) 1 or higher in histological diagnosis (p<0.001 and p<0.001, respectively). Among forty-six cases of atypical squamous cells of undetermined significance (ASCUS) in LBC, $p16^{INK4a}$ and Ki-67 was expressed in 31 (67.4%), which were positively associated with cases of CIN I lesion or higher in histology. The sensitivity of $p16^{INK4a}$/Ki-67 dual immunostaining for finding lesions of CIN 1 or higher was 89.0%, which was higher than LBC. The specificity was 73.5%, which was higher than that of the HC II test. Based on these results, the $p16^{INK4a}$/Ki-67 dual immunostaining method can be a useful diagnostic marker for improving the sensitivity of LBC and the specificity of HC II test. 최근 $p16^{INK4a}$/Ki-67 이중면역염색은 액상세포검사에서 자궁경부 이형성증과 암을 조기에 발견하기 위한 새로운 생체 표지자로 대두되고 있다. 저자들은 자궁경부질도말의 액상세포검체 총 109례에서 CINtec$^{(R)}$ PLUS kit를 사용하여 $p16^{INK4a}$/Ki-67 이중면역염색을 시행하였고, 그 결과를 액상세포검사, HPV hybrid capture II (HC II) 검사 그리고 조직학적 진단과 서로 비교하였다. $p16^{INK4a}$/Ki-67 양성 발현은 세포학적 진단에서 저등급 편평상피내병변 이상의 증례 그리고 조직학적 진단에서 자궁경부 상피내종양 1등급 이상의 증례에서 유의미하게 높았다. 액상세포검사상 비정형 편평 상피세포 소견을 보이는 46례 중, 31례 (67.4%)가 $p16^{INK4a}$과 Ki-67 양성 소견을 보였고, 이러한 양성 증례들은 조직검사에서도 대부분 자궁경부 상피내종양 1등급 이상의 병변에 해당하였다. 자궁경부 상피내종양 1등급 이상의 병변을 발견하기 위한 $p16^{INK4a}$/Ki-67 이중면역염색의 민감도는 액상세포검사보다 높은 89.0%였고, 특이도는 73.5%로 HC II 검사보다 높게 분석되었다. 따라서, $p16^{INK4a}$/Ki-67 이중면역염색 방법은 액상세포검사법의 민감도와 HC II 검사법의 특이도를 보완하기 위한 진단적 검사로 유용하다고 할 수 있다.
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자궁경부 이형성증과 암의 진단을 위한 액상세포 검체에서 p16INK4a/Ki-67 이중면역염색의 평가
성미희 ( Mi Hee Sung ),이훈택 ( Hoon Taek Lee ),신민식 ( Min Shik Shin ),오서영 ( Seo Young Oh ),김욱연 ( Wook Youn Kim ) 대한임상검사과학회 2015 대한임상검사과학회지(KJCLS) Vol.47 No.3
Recently, p16INK4a/Ki-67 dual immunostaining has been introduced as a new biomarker protocol for early detection of uterine cervical dysplasia and cancer in liquid-based cytology (LBC). We performed the p16INK4a/Ki-67 dual immunostaining using a CINtec® PLUS kit in a total of 109 LBC cases of cervicovaginal smear and compared its results with those from LBC, HPV hybrid capture II (HC II) test and histological diagnosis. Expression of p16INK4a and Ki-67 was significantly associated with cases of LSIL or higher in cytological diagnosis and cases of cervical intraepithelial neoplasia (CIN) 1 or higher in histological diagnosis (p<0.001 and p<0.001, respectively). Among forty-six cases of atypical squamous cells of undetermined significance (ASCUS) in LBC, p16INK4a and Ki-67 was expressed in 31 (67.4%), which were positively associated with cases of CIN I lesion or higher in histology. The sensitivity of p16INK4a/Ki-67 dual immunostaining for finding lesions of CIN 1 or higher was 89.0%, which was higher than LBC. The specificity was 73.5%, which was higher than that of the HC II test. Based on these results, the p16INK4a/Ki-67 dual immunostaining method can be a useful diagnostic marker for improving the sensitivity of LBC and the specificity of HC II test.
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