• Asian Pacific Journal of Cancer Prevention
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• 제13권8호
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• pp.3645-3651
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• 2012

Conventional pap smear (CPS) examination has been the mainstay for early detection of cervical cancer. However, its widespread use has not been possible due to the inherent limitations, like presence of obscuring blood and inflammation, reducing its sensitivity considerably. Automated methods in use in developed countries may not be affordable in the developing countries due to paucity of resources. On the other hand, manual liquid based cytology (MLBC) is a technique that is cost effective and improves detection of precursor lesions and specimen adequacy. Therefore the aim of the study was to compare the utility of MLBC with that of CPS in cervical cancer screening. A prospective study of 100 cases through MLBC and CPS was conducted from October 2009 to July 2010, in a Medical College in India, by two independent pathologists and correlated with histopathology (22 cases). Morphological features as seen through MLBC and CPS were compared. Subsequently, all the cases were grouped based on cytological diagnosis according to two methods into 10 groups and a subjective comparison was made. In order to compare the validity of MLBC with CPS in case of major diagnoses, sensitivity and specificity of the two methods were estimated considering histological examination as the gold standard. Increased detection rate with MLBC was 150%. The concordance rate by LBC/histopathology v/s CPS/histopathology was also improved (86% vs 77%) The percentage agreement by the two methods was 68%. MLBC was more sensitive in diagnosis of LSIL and more specific in the diagnosis of inflammation. Thus, MLBC was found to be better than CPS in diagnosis of precursor lesions. It provided better morphology with increased detection of abnormalities and preservation of specimen for cell block and ancillary studies like immunocytochemistry and HPV detection. Therefore, it can be used as alternative strategy for cervical cancer prevention in limited resource settings.

• Asian Pacific Journal of Cancer Prevention
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• 제16권14호
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• pp.5993-5999
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• 2015

Background: Molecular testing for human papillomavirus (HPV) is the most objective and reproducible of all cervical cancer screening tests and also less demanding in terms of training and quality assurance. However, there is an impending need for cost effective molecular HPV testing methods with sampling ease, easy storage measures and minimum turn around times suitable for a low resource setting. Objective : Our aim was to evaluate the feasibility of using a fast transfer analysis (FTA) mini elute cartridge for cervical sampling to identify high risk HPV by real time PCR and to compare molecular HPV testing and Pap cytology testing to predict histologically confirmed cervical precancer (CIN 2+ lesions) in a cervical cancer prevention program. Materials and Methods: This was conducted as a pilot study (n=200) on women sampled using FTA mini elute cartridges, genotyped by two different real time PCR assays, detecting 13 high risk HPV (HR HPV) species, including HPV16 along with its physical DNA status. Results obtained from each of the tests were compared and analysed using suitable statistical tests. Results: With FTA mini elute cartridge samples HR HPV positivity was seen in 48/200 (24%). Of these, presence of HPV 16 DNA was observed in 28/48 (58.3%) women. High risk HPV was positive in 20% (37/185) of women with benign cytology and 73.3% (11/15) of women with abnormal cytology findings. A very significant correlation (${\chi}^2=22.090$ ; p=0.000) was observed between cytology and HR HPV findings showing an increasing trend of HR HPV prevalence in 50% (1/2) of LSIL, 75% (3/4) of HSIL and 100% (3/3) of SCC. Of the CIN 2+ lesions identified by histopathology, 88.9% (8/9) had HR HPV. A significant association (${\chi}^2=11.223$ ; p=0.001) of HR HPV and histopathologically confirmed CIN 2+ lesions was found. Sensitivity of the two tests were comparable but specificity of Pap testing was better (90.7% vs 70.4%) to predict histopathologically diagnosed cervical precancers. Conclusions: The current study explored the feasibility of using a FTA mini elute cartridge for cervical sampling for the first time in India as a part of a community based cervical cancer prevention program. We suggest that FTA based sampling is suitable and feasible for real time based HPV testing. Molecular HR HPV testing can be more sensitive and useful to identify high risk women requiring Pap testing which is more specific to detect histologically confirmed cervical precancer.

• Asian Pacific Journal of Cancer Prevention
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• 제16권10호
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• pp.4223-4228
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• 2015

Objective: To investigate the diagnostic value of the R-way colposcopic evaluation system (R-way system) in cervical cancer screening. Materials and Methods: Between August 2013 and August 2014, a total of 1,059 cases referred to colposcopy in Peking University First Hospital were studied using both the R-way system and conventional colposcopy. Our study evaluated and compared the diagnostic ability of the two methods in detecting high-grade lesions and cervical cancer (hereinafter called CIN2+). Evaluation indicators including sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), Youden index and the area under the curve (AUC) of the receiver operating characteristic (ROC) were calculated. Results: The R-way system had a slightly lower specificity (94.5%) than conventional colposcopy (96.0%) for CIN2+ detection (P=0.181). However, the sensitivity (77.8%) was significantly higher than with the conventional colposcopic method (46.6%) (${\chi}^2=64.351$, P<0.001). In addition, the AUC of the ROC for CIN2+ detection using the R-way system (0.839) was larger than that with conventional colposcopy (0.731) (Z=4.348, P<0.001). If preliminary result had been drawn from cervical exfoliated cytology before colposcopy referral, combination of the R-way system with cytology could increase the sensitivity to 93.9% for CIN2+ detection (excluding ASCUS\LSIL), confirmed by multipoint biopsy or ECC. Conclusions: The diagnostic value of the R-way evaluation system is higher than that of conventional colposcopic evaluation in cervical cancer screening. Moreover, taking the ease of use and standardized quality control management into account, the R-way system is highly preferable.

• Asian Pacific Journal of Cancer Prevention
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• 제17권7호
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• pp.3147-3153
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• 2016

Background: Many strategies are required for cervical cancer reduction e.g. provision of education cautious sexual behavior, HPV vaccination, and early detection of pre-invasive cervical lesions and invasive cancer. Basic health data for cervical cytology/ HPV DNA and associated factors are important to make an appropriate policy to fight against cervical cancer. Aims: To assess the prevalence of abnormal cervical cytology and/or HPV DNA and associated factors, including sexual behavior, among Bangkok Metropolitan women. Materials and Methods: Thai women, aged 25-to-65 years old, had lived in Bangkok for ${\geq}5$ years were invited into the study. Liquid-based cervical cytology and HPV DNA tests were performed. Personal data were collected. Main Outcomes Measures: Rates of abnormal cytology and/ or high-risk HPV (HR-HPV) and factors associated with abnormal test (s) were studied. Results: Abnormal cytology and positive HR-HPV were found in 6.3% (279/4442 women) and 6.7% (295/4428), respectively. The most common abnormal cytology was ASC-US (3.5%) while the most common HR-HPV genotype was HPV 16 (1.4%) followed by HPV 52 (1.0%), HPV 58 (0.9%), and HPV 18 and HPV 51 at equal frequency (0.7%). Both tests were abnormal in 1.6% (71/4428 women). Rates of HR-HPV detection were directly associated with severity of abnormal cytology: 5.4% among normal cytology and 13.0%, 30.8%, 40.0%, 39.5%, 56.3% and 100.0% among ASC-US, ASC-H, AGC-NOS, LSIL, HSIL, and SCC, respectively. Some 5% of women who had no HR-HPV had abnormal cytology, in which 0.3% had ${\geq}$ HSIL. Factors associated with abnormal cytology or HR-HPV were: age ${\leq}40$ years, education lower than (for cytology) or higher than bachelor for HR-HPV), history of sexual intercourse, and sexual partners ${\geq}2$. Conclusions: Rates for abnormal cytology and HR-HPV detection were 6.3% and 6.7% HR-HPV detection was directly associated with severity of abnormal cytology. Significant associated factors were age ${\leq}40$ years, lower education, history of sexual intercourse, and sexual partners ${\geq}2$.

• Asian Pacific Journal of Cancer Prevention
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• 제14권9호
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• pp.5519-5525
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• 2013

Background: Cervical cancer is the second most common cancer in Thai women after breast cancer. Currently, the Papanicolaou (Pap) smear is the recommended procedure for cervical cancer screening in Thailand, but only a relatively small percentage of women follow this screening program. An alternative method to detect HPV genotypes associated with cervical cancer is self-sampling of urine, which is a more widely accepted method. Our study aimed to evaluate the prevalence of HPV in Thai women using urine and cervical swabs and prevalence of HPV in Thai men using urine samples. Materials and Methods: Tumorigenic HPV detection was accomplished by electrochemical DNA chip and PCR/direct sequencing. In addition to HPV prevalence, we report the concordance between different methods and sample types. One-hundred and sixteen women and 100 men were recruited. Histological examination revealed normal cytology in 52 women, atypical squamous cells of undetermined significance (ASCUS) in 9, low-grade squamous intraepithelial lesions (LSIL) in 24, and high-grade squamous intraepithelial lesions (HSIL) in 31. One-hundred men were classified as heterosexuals (n=45) and homosexuals (n=55). Results: The most prevalent HPV genotype in our study was HPV16. The HPV detection rate was generally lower in urine samples compared with cervical samples. Overall, there was good agreement for the detection of carcinogenic HPV from female cervical samples between the DNA chip and PCR/sequencing, with 88.8% total agreement and a kappa value of 0.76. In male urine samples, the level of agreement was higher in heterosexuals compared with homosexuals. Conclusions: Further improvement is required to increase an overall yield of HPV DNA detection in urine samples before clinical application of a urine-based HPV screening program. The electrochemical DNA chip test is a promising technique for carcinogenic HPV detection.

• 대한세포병리학회지
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• 제19권2호
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• pp.111-118
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• 2008

Background : Cervicovaginal cytology is a screening test of uterine cervical cancer. The sensitivity of cervicovaginal cytology is less than 50%, but studies of cytologic/histologic correlation are limited. We analyzed the diagnostic accuracy of cervicovaginal cytology in the detection of the squamous epithelial lesions of the uterine cervix and investigate the cause of diagnostic discordance. Materials and Methods : We collected a total of 481 sets of cervicovaginal cytology and biopsies over 5 years. The cytologic diagnoses were categorized based on The Bethesda System and the histologic diagnoses were classified as negative, flat condyloma, cervical intraepithelial neoplasia (CIN) I, CIN II, CIN III, or squamous cell carcinoma. Cytohistologic discrepancies were reviewed. Results: The concordance rate between the cytological and the histological diagnosis was 79.0%. The sensitivity and specificity of cervicovaginal cytology were 80.6% and 92.6%, respectively. Its positive predictive value and negative predictive value were 93.7% and 77.7%, respectively. The false negative rate was 19.4%. Among 54 false negative cytology cases, they were confirmed by histology as 50 flat condylomas, 2 CIN I, 1 CIN III, and 1 squamous cell carcinoma. The causes of false negative cytology were sampling errors in 75.6% and interpretation errors in 24.4%. The false positive rate was 7.4%. Among 15 false positive cytology cases, they were confirmed by histology as 12 atypical squamous cells of undetermined significance (ASCUS) and 3 low grade squamous intraepithelial lesions (LSIL). The cause of error was interpretation error in all cases. The overall diagnostic accuracy of cervicovaginal cytology was 85.7%. Conclusions : Cervicovaginal cytology shows high overall diagnostic accuracy and is a useful primary screen of uterine cervical cancer.

• 대한임상검사과학회지
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• 제47권4호
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• pp.259-266
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• 2015

자궁경부암은 전세계 여성에서 세 번째로 많이 발생하는 암이다. 인유두종 바이러스(HPV) 감염이 자궁경부암 발병에 주요한 역할을 한다. HPV 감염은 지리적 위치나 면역학적 상태, 성적 병력, 유전적 요인 등에 영향을 받는다. 예를 들어, HPV 감염률이 스페인에서는 1.5%인 반면, 온두라스와 케냐에서는 39%에 육박한다. 그러나 HPV 감염률과 나이와의 연관성에 대해서는 알려진 바가 적다. 나이에 대한 HPV 감염률 분석은 어느 나이대가 자궁경부암에 고위험군인지를 알아낼 수 있다. 또한 특정 HPV 유전형과 나이 간의 연관성을 입증할 수 있다. 게다가 백신을 주사하는 데에 최적의 나이대를 명확히 알 수 있을 것이다. 이 연구에서는 한국과 중국 여성에서의 HPV 감염률과 유전형 분포를 나이에 따라 분석하였다. 한국과 중국 여성의 자궁 탈락 세포로 REBA HPV-ID$^{(R)}$ 검사법(YD 진단법, 용인, 대한민국)을 통해 HPV 유전형을 파악하였다. 편평세포암과 고등급 병변의 환자군에서는 40대와 50대가 주를 이룬 반면, 중간병변의 환자군에서는 30대와 40대가 주를 이뤘다. HPV 16, 18형 감염은 주로 40대에 속했다. 이러한 결과는 지속적인 감염이 자궁경부암을 일으킨다는 주장을 뒷받침한다.

• Journal of Yeungnam Medical Science
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• 제16권2호
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• pp.169-180
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• 1999

우리 나라 여성암 중에서 가장 높은 발생률을 보이고 있는 자궁경부암의 선별 검사로서 자궁경부 확대 촬영술의 가능성을 검토하기 위하여 1998년 3월 1일부터 1999년 10월 31일 사이에 자궁암 검진 목적으로 자궁경부 확대 촬영을 시행한 482명의 여성 중에서 310명을 대상으로 한 연구에서 다음과 같은 결과를 얻었다. 대상 환자의 평균 산과력은 임신 4.4회, 분만 2.6회, 유산 1.9회였고 검진의 목적은 정기 검진이 164명으로 가장 많았다. 연령별로는 35-39세 군이 가장 많았고 다음으로 40-44세군, 45-49세군의 순이었으며 마지막 세포진 검사와의 검진 간격은 평균 17.1개월이었고 지금까지 한 번도 검사를 받지 않았던 여성은 64명이었다. 310명의 여성 중 정상으로 판단된 254명을 제외한 56명에서 질확대경 조준 하 생검을 시행하였으며 생검 소견은 만성 자궁경부염 26례, 경증 이형증 4례, 중등도 이형증 6례, 중증 이형증 2례, 자궁경부 상피내암 14례 및 침윤암 4례였다. 세포진 검사 결과와 자궁 경부 확대 촬영술의 결과는 비교적 잘 일치하였다. 세포진 검사 결과가 LSIL 이상일 때를 비정상으로 판정했을 때의 민감도와 특이도는 각각 86.7% 및 76.9%였고, 양성 예측률과 음성 예측률은 각각 81.3% 및 83.3%였으며 위양성률과 위음성률은 각각 23.1%와 13.3%였다. 자궁 경부 확대 촬영에서 의증(S2) 이상일 때를 비정상으로 판정했을 때 민감도와 특이도는 각각 56.7% 및 96.2%였고, 양성 예측률과 음성 예측률은 각각 94.4% 및 65.8%였으며 위양성률과 위음성률은 각각 3.8%와 43.3%였다. 자궁경부 확대 촬영술의 민감도는 세포진 검사에 비해 매우 낮았으나 특이도는 훨씬 높았고 서로 보완관계가 있음을 나타내었다. 또 자궁경부 확대 촬영술에서 위음성률이 높았으나 위양성률은 낮은 결과를 보였다. 본 연구의 결과 자궁 경부 확대 촬영은 단독으로 선별검사에 사용하는 것보다는 세포진 검사와의 상호 보완적인 방법으로 사용되어야 할 것으로 생각되었고 세포진 검사의 단점을 보완하는 자궁경부암의 집단 검진 방법으로 가능성이 높을 것으로 예상되었다.

• 대한임상검사과학회지
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• 제47권3호
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• pp.132-139
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• 2015

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.