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Conventional Pap Smear (conventional + pap_smear)
Selected AbstractsO-13 ENDOMETRIAL CARCINOMA DETECTED WITH SUREPATH LIQUID BASED CERVICAL CYTOLOGY: COMPARISON WITH CONVENTIONAL CERVICAL CYTOLOGYCYTOPATHOLOGY, Issue 2006C. J. Patel Introduction:, Conventional Pap Smear (CPS) has had little impact on the detection of endometrial carcinoma (MC). Although Liquid Based Cytology (LBC) is replacing CPS in the UK, experience with identification of endometrial cancers with this is limited. A few studies of ThinPrep LBC show promise with reported increased detection rate, but to date, there has been no reported study of detection with SurePath LBC. Aim:, The purpose of this 2-year retrospective study was to compare the accuracy of the SurePath LBC with that of conventional smear in detecting endometrial cancers. Methods:, Our study group consisted of all SurePath cases of endometrial atypia/carcinoma diagnosed between 1st Jan 2004 and 31st Dec 2005, following 100% conversion of our laboratory to the SurePath system in 2001. Conventional smears reported over a 6-year period (1993,1998), comprised the control group. Histological follow up was obtained. Results:, Endometrial lesions were reported in 95 (0.07%) of 130352 SurePath LBC smears. These included 70 (0.053%) reports of endometrial atypia, 05 (0.003%) suspicious and 20 (0.015%) diagnostic of endometrial carcinoma. A total of 58 (0.014%) cases of 409495 CPS were diagnosed as endometrial carcinoma. Adequate histological follow up was available in 47 (49.5%) SurePath LBC and 52 (89.6%) conventional cases. In these, the positive predictive value (PPV) for endometrial carcinoma of SurePath LBC was 73.3% compared to 55.4% of CPS. The PPV for endometrial carcinoma of the atypical and suspicious LBC categories was 14.3% and 40% respectively. No categorisation as atypical or suspicious in the conventional study was available for comparison. The sensitivity of the SurePath LBC, calculated from retrograde analysis of histologically diagnosed endometrial cancers during the same period was 40%. Conclusion:, The SurePath LBC is at least an as accurate and sensitive method for detecting endometrial cancer as CPS. [source] Cervical biopsy-based comparison of a new liquid-based thin-layer preparation with conventional Pap smearsDIAGNOSTIC CYTOPATHOLOGY, Issue 4 2004Maria da Gloria Mattosinho de Castro Ferraz M.D. Abstract The objective of this study is to compare the diagnostic efficacy of universal collection medium (UCM) liquid-based cytology (LBC) (Digene Corp., MD) and the conventional Pap smear in a comparative study, using histologic results as the gold standard. This was a cross-sectional study. Conventional Pap smears and UCM LBC specimens, obtained from women in a low socioeconomic outpatient population referred to a tertiary center for gynecologic care, were compared. For the purpose of this study, when cervical specimens were collected for cytology, all women underwent colposcopy and biopsy was done if a cervical abnormality was observed. Cytologic evaluation of UCM LBC and conventional Pap smears were carried out separately, masked to the results of the other method. Agreement beyond chance between the two cytologic methods was ascertained by means of the unweighted , statistic. Sensitivity, specificity, and predictive values with 95% confidence intervals were calculated for both methods. McNemar's test was used to determine the level of association between the two cytology procedures. A total of 800 women were evaluated. Assessment of the overall agreement between the two cytologic methods yielded a , of 0.777 (P < 0.0001). After adjustment for histologic diagnosis, the computed , in each stratum was as follows: normal = 0.733; CIN 1 = 0.631; CIN 2/3 = 0.735; cancer = 0.652. The sensitivity and specificity of UCM LBC for detection of cervical intraepithelial lesions and cancer were 75.3% and 86.4%, respectively, not statistically different from the 81.8% and 85.2% seen with the conventional method. This study demonstrates that the UCM LBC method is as accurate as the conventional Pap smear cytology in detecting cervical intraepithelial lesions and cancer even so the UCM samples were systematically prepared from a second sampling of the cervix. Diagn. Cytopathol. 2004;30:220,226. © 2004 Wiley-Liss, Inc. [source] Liquid-based cytology: is this the way forward for cervical screening?CYTOPATHOLOGY, Issue 2 2002R. P. MOSELEY Liquid-based cytology: is this the way forward for cervical screening? Liquid-based cytology (LBC) is currently being marketed as an alternative methodology to replace the conventional PAP smear in cervical cytology. A substantial body of literature exists in support of LBC, some of which is at least partially sponsored by product manufacturers. The majority of published literature in support of LBC employs Bethesda reporting terminology. In this study we have analysed published raw data and presented this in NHSCSP terminology. Claims relating to sensitivity, specificity and smear adequacy have then been considered with reference to this data. Our analysis of existing data does not support the nationwide implementation of LBC at present. Further studies are recommended in order to evaluate the place of this technology within the NHSCSP. [source] Cervical biopsy-based comparison of a new liquid-based thin-layer preparation with conventional Pap smearsDIAGNOSTIC CYTOPATHOLOGY, Issue 4 2004Maria da Gloria Mattosinho de Castro Ferraz M.D. Abstract The objective of this study is to compare the diagnostic efficacy of universal collection medium (UCM) liquid-based cytology (LBC) (Digene Corp., MD) and the conventional Pap smear in a comparative study, using histologic results as the gold standard. This was a cross-sectional study. Conventional Pap smears and UCM LBC specimens, obtained from women in a low socioeconomic outpatient population referred to a tertiary center for gynecologic care, were compared. For the purpose of this study, when cervical specimens were collected for cytology, all women underwent colposcopy and biopsy was done if a cervical abnormality was observed. Cytologic evaluation of UCM LBC and conventional Pap smears were carried out separately, masked to the results of the other method. Agreement beyond chance between the two cytologic methods was ascertained by means of the unweighted , statistic. Sensitivity, specificity, and predictive values with 95% confidence intervals were calculated for both methods. McNemar's test was used to determine the level of association between the two cytology procedures. A total of 800 women were evaluated. Assessment of the overall agreement between the two cytologic methods yielded a , of 0.777 (P < 0.0001). After adjustment for histologic diagnosis, the computed , in each stratum was as follows: normal = 0.733; CIN 1 = 0.631; CIN 2/3 = 0.735; cancer = 0.652. The sensitivity and specificity of UCM LBC for detection of cervical intraepithelial lesions and cancer were 75.3% and 86.4%, respectively, not statistically different from the 81.8% and 85.2% seen with the conventional method. This study demonstrates that the UCM LBC method is as accurate as the conventional Pap smear cytology in detecting cervical intraepithelial lesions and cancer even so the UCM samples were systematically prepared from a second sampling of the cervix. Diagn. Cytopathol. 2004;30:220,226. © 2004 Wiley-Liss, Inc. [source] Cervical cancer screening program integrating Pap smear and HPV DNA testing: A population-based studyINTERNATIONAL JOURNAL OF CANCER, Issue 12 2008Angel Chao Abstract We conducted a population-based cohort study to evaluate the complementary value of HPV testing to Papanicolaou (Pap) smear and the prevalence and genotype distribution of HPV in Taiwan. In this report, we described the design of the whole study and analyzed the cross-sectional results. Female residents (age , 30 years) of Taoyuan, Taiwan were invited. After signing informed consent, every participant had a Pap smear and a HPV testing. Patients with Pap , atypical squamous cell of undetermined significance (Group I) or those with HPV-positive but normal cytology (Group II) were referred for a colposcopic examination. A total of 10,014 women were eligible. The overall HPV prevalence was 10.8% (95% confidence interval 10.5%,11.4%) in the study population. A total of 37 types of HPV were identified and the leading three were HPV-52, -18 and -58. There was a significant positive correlation of HPV prevalence with older age, postmenopausal status, current-user of oral contraceptives and never-user of hormone replacement therapy. Past users of oral contraceptives and never users of Pap were associated with higher risk of abnormal Pap, while age 40,49 strata had lower risk. Fifty-nine cases of cervical intraepithelial neoplasia (CIN) 2 from Group I and additional 11 from Group II were identified. The improvement of sensitivity with additional HPV testing was 15.3%. Besides, no specific subgroup was found to most benefit from the combined strategy. The value of adding HPV test to conventional Pap smear has to be evaluated after longer-term follow-up of this population-based cohort. © 2008 Wiley-Liss, Inc. [source] Comparison of three management strategies for patients with atypical squamous cells of undetermined significance, after six months delay: A three-year experience in an Iranian university hospitalAUSTRALIAN AND NEW ZEALAND JOURNAL OF OBSTETRICS AND GYNAECOLOGY, Issue 2 2009Fariba YARANDI Background: A Pap test result of atypical squamous cells of undetermined significance (ASCUS) presents a clinical challenge. Only 5,10% of women with ASCUS harbour serious cervical disease. Methods: We screened 3619 women, who attended to Mirza Koochak Khan Hospital at Tehran University of Medical Sciences with Pap smears, of whom 100 returned with ASCUS. After six months, each subject underwent a standard cytology (conventional Pap smear), human papillomavirus (HPV) DNA testing (identifying high-risk HPV types with polymerase chain reaction) and colposcopy with multiple cervical biopsies. Results: Mean age was 44.09 ± 8.6 years. The estimated prevalence of cervical intraepithelial neoplasia (CIN) II or higher was 4%. When histologically verified high-grade lesions (, CIN II) were observed, the relative sensitivity of HPV DNA testing was 100% compared with conventional Pap smear, which performed 75% versus 100% relative sensitivity, respectively, using cytological diagnosis high-grade squamous intraepithelial lesion, or low-grade squamous intraepithelial lesion (LSIL) as the cut-off. Negative and positive predictive values (NPV and PPV) of Pap test were 98.9% and 100%. The NPV and PPV of HPV DNA testing were 100%. Conclusions: Although less complicated than colposcopy, the repeat Pap smear triage algorithm for ASCUS may underdiagnose some women with high-grade CIN, when compared with colposcopy. Considering the high sensitivity of HPV testing, it may be useful as an alternative to the current policy of six-month repeat cytology for women with ASCUS results. [source] Comparing Accuracy in an Unpaired Post-market Device Study with Incomplete Disease AssessmentBIOMETRICAL JOURNAL, Issue 3 2009Todd A. Alonzo Abstract The sensitivity and specificity of a new medical device are often compared relative to that of an existing device by calculating ratios of sensitivities and specificities. Although it would be ideal for all study subjects to receive the gold standard so true disease status was known for all subjects, it is often not feasible or ethical to obtain disease status for everyone. This paper proposes two unpaired designs where each subject is only administered one of the devices and device results dictate which subjects are to receive disease verification. Estimators of the ratio of accuracy and corresponding confidence intervals are proposed for these designs as well as sample size formulae. Simulation studies are performed to investigate the small sample bias of the estimators and the performance of the variance estimators and sample size formulae. The sample size formulae are applied to the design of a cervical cancer study to compare the accuracy of a new device with the conventional Pap smear. [source] Cervical biopsy-based comparison of a new liquid-based thin-layer preparation with conventional Pap smearsDIAGNOSTIC CYTOPATHOLOGY, Issue 4 2004Maria da Gloria Mattosinho de Castro Ferraz M.D. Abstract The objective of this study is to compare the diagnostic efficacy of universal collection medium (UCM) liquid-based cytology (LBC) (Digene Corp., MD) and the conventional Pap smear in a comparative study, using histologic results as the gold standard. This was a cross-sectional study. Conventional Pap smears and UCM LBC specimens, obtained from women in a low socioeconomic outpatient population referred to a tertiary center for gynecologic care, were compared. For the purpose of this study, when cervical specimens were collected for cytology, all women underwent colposcopy and biopsy was done if a cervical abnormality was observed. Cytologic evaluation of UCM LBC and conventional Pap smears were carried out separately, masked to the results of the other method. Agreement beyond chance between the two cytologic methods was ascertained by means of the unweighted , statistic. Sensitivity, specificity, and predictive values with 95% confidence intervals were calculated for both methods. McNemar's test was used to determine the level of association between the two cytology procedures. A total of 800 women were evaluated. Assessment of the overall agreement between the two cytologic methods yielded a , of 0.777 (P < 0.0001). After adjustment for histologic diagnosis, the computed , in each stratum was as follows: normal = 0.733; CIN 1 = 0.631; CIN 2/3 = 0.735; cancer = 0.652. The sensitivity and specificity of UCM LBC for detection of cervical intraepithelial lesions and cancer were 75.3% and 86.4%, respectively, not statistically different from the 81.8% and 85.2% seen with the conventional method. This study demonstrates that the UCM LBC method is as accurate as the conventional Pap smear cytology in detecting cervical intraepithelial lesions and cancer even so the UCM samples were systematically prepared from a second sampling of the cervix. Diagn. Cytopathol. 2004;30:220,226. © 2004 Wiley-Liss, Inc. [source] Comparison of a self-administered tampon ThinPrep test with conventional pap smears for cervical cytologyAUSTRALIAN AND NEW ZEALAND JOURNAL OF OBSTETRICS AND GYNAECOLOGY, Issue 3 2005Mardi BUDGE Abstract Aim: To assess a self-administered tampon specimen as an alternative method of detecting cytological abnormalities and its acceptability in comparison with a conventional Papanicolou (pap) smear. Design: Comparative observational study. Setting/population: Two hundred and seventeen women were recruited from the colposcopy clinic of an outer urban public teaching hospital and from sexual health clinics at suburban and major metropolitan hospital clinics. Methods: Participants inserted and immediately withdrew a tampon, then placed it into a vial of ThinPrep PreservCyt fluid. This was analysed by a local private pathology laboratory. Results were compared to a pap smear performed the same day or within the previous 6 months. All women with an abnormal result (tampon or pap smear) underwent a colposcopy, with or without biopsy as necessary. Participants completed a questionnaire after performing the tampon test. Outcome measures: Probabilities of tampon test detecting (i) a high grade abnormality (pHG), (ii) any cervical intraepithelial neoplasia (CIN) changes (pCINany), and (iii) any abnormalities (pabn) compared to the conventional pap smear and, if abnormal, compared to the biopsy taken at colposcopy. Acceptability of the tampon test and conventional pap smear were also measured. Results: Probabilities of the tampon test compared to pap smear: pabn sensitivity 33%, specificity 89%, PPV 59%, NPV 73%; pCINany sensitivity 23%, specificity 97%, PPV 71%, NPV 79%; pHG sensitivity 19%, specificity 98%, PPV 63%, NPV 89%. Acceptability for tampon test was 91.21% and for pap smear, 45.85%. Conclusions: Although the self-administered tampon ThinPrep method is a poor detector of cervical abnormalities compared to pap smear, it is highly acceptable to women. It has a relatively good negative predictive value (NPV). Our study suggests that if a more acceptable, sensitive method of cervical screening was found, which removed some of the existing barriers to conventional pap testing, screening rates for cervical cancer may improve. [source] | ||||||||||