<b><span>Background:</span></b><span> Liquid-based cytology (LBC) is a method of manufacturing cyto-diagnostic specimens. Improved accuracy is expected from standardizing specim...<b><span>Background:</span></b><span> Liquid-based cytology (LBC) is a method of manufacturing cyto-diagnostic specimens. Improved accuracy is expected from standardizing specimen production and use of this method is rapidly spreading in oral cytology. On the other hand, LBC reportedly requires training to show peculiar cell findings compared to those of conventional smear cytology (CVC). Few studies have compared detailed cell findings for oral CVC and LBC.</span><span> </span><b><span>Objec</span></b><b><span>tives:</span></b><span> The aim of this study was to compare cytological findings between CVC </span><span>and LBC using cytomorphological image analysis.</span><span> </span><b><span>Materials and Methods:</span></b><span> Cytological specimens were collected from 20 patients (negative for squamous neoplasia in 10, dysplasia in 5, squamous cell carcinoma in 5) and 5 controls of the tongue between January 2017 and December 2018. Two different preparation techniques were investigated cytomorphologically for CVC and LBC (BD Cytorich</span><sup><span style="vertical-align:super;">TM</span></sup><span>).</span><span> </span><b><span>Results:</span></b><span> LBC showed significantly higher cell numbers tha</span><span>n CVC for all lesions. LBC-to-CVC ratio ranged from 9.52 (hyp</span><span>erkeratosis) to 1.87 (deep cells in oral squamous cell carcinoma (OSCC)). Nuclear area of </span><span>normal, hyperkeratosis, and inflammation were significantly higher in LBC tha</span><span>n those of CVC. Hyperchromasia was significantly more frequent with </span><span>CVC than with LBC for hyperkeratosis, inflammation, dysplasia and OSCC. There was no significant difference in circularity between CVC and LBC </span><span>among all lesions. </span><b><span>Conclusion:</span></b><span> Only one cytomorphological disadvantage was </span><span>se</span><span>en with LBC, in the form of decreased hyperchromasia. Further </span><span>clarification of the advantages and disadvantages of LBC is needed, including management of precision and screening practices.展开更多
Cancer of the corpus uteri remains the most common gynecological related cancer in developed countries. Cytology, after the induction of liquid based cytology, has reemerged as a possible first line non-interventional...Cancer of the corpus uteri remains the most common gynecological related cancer in developed countries. Cytology, after the induction of liquid based cytology, has reemerged as a possible first line non-interventional diagnostic procedure with promising results. Apart from slide preparation for cytology diagnosis, LBC allows the application of elaborate molecular tests on the residual material. Samples from 74 symptomatic women were collected in ThinPrep?PreservCyt medium, from witch immunocytochemical and molecular tests were performed. Final diagnosis of 39 endometrioid carcinomas, 20 non-endometrioid carcinomas and 15 non-malignant was set after hysterectomy. Topoisomerase IIa expression was common (42%) in both types of cancer. Promoter methylation analysis revealed that hMLH1 is commonly methylated in cancers (52.7%), CDKN2A and MGMT less often (27.1%) and RARB rarely methylated (8.4%). BRAF activating mutation V600E was a rare event (8.4%) only found in low grade endometrioid carcinomas. Topoisomerase IIa expression correlated with BRAF mutations, hMLH1 and to lesser extent with CDKN2A methylation. Almost none of the biomarkers were positive in cytological negative or hyperplastic without atypia samples. Detection of methylation in any gene displayed sensitivity, specificity, PPV and NPV similar to cytology of cancer. However, inclusion of cytology diagnosis of hyperlasias with atypia increased sensitivity and NPV of cytology outperforming methylation of any gene. Further evaluation of the panel of promoter methylation, especially in cytology diagnoses of hyperplasia with or without atypia should be evaluated since initial results are promising. Even though methylation of MGMT and RARB are rare events, some patients could be benefit from specific chemotherapeutics that target either of them or the more frequently expressed topoisomerase IIa.展开更多
This study examined cells contained in needles used for the collection of breast fine needle aspirates for the detection of malignant cells trapped in the needles. Remnants of cells contained in 50 needles used for th...This study examined cells contained in needles used for the collection of breast fine needle aspirates for the detection of malignant cells trapped in the needles. Remnants of cells contained in 50 needles used for the collection of scanty breast fine needle aspirates were examined by the liquid based cytology technique and compared with the conventional cytological technique of specimens in the corresponding syringes. The breast specimens were collected with clean sterile needles attached to the syringes. Smears were made and stained by the conventional method. The needles were removed from the syringes and a fixative was withdrawn into the syringes and the syringes were recapped with the needles. The fixative containing the specimen was then completely discharged into a centrifuge tube through the needles and treated by the liquid based cytology technique. The study revealed that cells were found trapped in all the needles used for the collection of breast FNA. 6% of them were positive for malignancy, similar to results obtained in the conventional method. Needles used for the collection of breast FNA should be examined before malignancy is completely ruled out particularly in extremely scanty specimens with a clinical suspicion of malignancy.展开更多
Background: The detection of vaginal intraepithelial neoplasia (VAIN) in cervical samples is not a common finding. Therefore, we aimed to report VAINs detected in liquid-based cytology (LBC) from women examined at Hos...Background: The detection of vaginal intraepithelial neoplasia (VAIN) in cervical samples is not a common finding. Therefore, we aimed to report VAINs detected in liquid-based cytology (LBC) from women examined at Hospital das Clínicas of Faculty of Medicine, Sao Paulo State University. Materials and Methods: We evaluated LBC samples from women referred to gynecology examination for different reasons (previous abnormal PapTest, follow up of treated cervical lesion, ecc) and women examined for regular screening proposals, and compared with biopsy diagnoses, including the controversial diagnoses of vaginal intraepithelial neoplasia (VAIN). Results: From 1866 patients, 1423 (76.3%) cases were negative and 443 (23.7%) were positive for any cellular alteration. Age of patients ranged from 12 to 86 years. We detected 25 histologically confirmed VAIN (1.3% p = 0.0002 by Fisher’s exact test IC 95% 0.0090 - 0.0198) and 1.1% VAIN (p = 0.0031 by Fisher’s exact test IC 95% 0.0077 - 0.0179). Conclusion: The identification of VAIN in routine is feasible;the professionals involved with cytological examination should be aware of these lesions in Pap test samples.展开更多
目的探索并验证基于华为云ModelArts平台构建的深度学习模型在宫颈液基细胞学(liquid-based cytology,LBC)非典型细胞诊断中的应用价值,并评估其对不同诊断经验医师的辅助效果。方法回顾性分析2020年东莞市人民医院1044例宫颈脱落细胞...目的探索并验证基于华为云ModelArts平台构建的深度学习模型在宫颈液基细胞学(liquid-based cytology,LBC)非典型细胞诊断中的应用价值,并评估其对不同诊断经验医师的辅助效果。方法回顾性分析2020年东莞市人民医院1044例宫颈脱落细胞学标本,采用华为云ModelArts平台开发的人工智能(artifical intelligence,AI)辅助诊断系统与初级、中级、高级医师进行诊断比对,计算灵敏度、特异度、精确率、符合率、曲线下面积(area under the curve,AUC)等指标,评估AI系统的诊断效能及其对不同年资医师的辅助诊断效果。采用McNemar检验比较AI系统与人工诊断的差异。结果在1044例宫颈脱落细胞学标本中,AI系统在非典型细胞检出的灵敏度和特异度分别为98.96%和89.15%,均高于初级医师(81.95%和91.81%)。AI系统的总体诊断精确率为93.68%,显著高于初级医师(87.26%,P<0.001)。AI辅助可显著提高初级医师的诊断性能,灵敏度从80.1%提升至96.5%,特异度从85.6%提升至92.3%。结论本研究构建的AI辅助宫颈细胞学诊断系统性能优越,尤其能显著提高初级医师的诊断水平,具有良好的临床应用前景。展开更多
目的:脉络膜黑色素瘤(melanoma of choroid,CM)是成人常见的原发性眼内恶性肿瘤,特点为恶性程度高、易侵袭转移、预后极差,严重影响患者视力,甚至威胁患者生命。目前诊断CM主要依赖影像学检查,在眼球摘除手术后加做病理诊断,缺乏明确的...目的:脉络膜黑色素瘤(melanoma of choroid,CM)是成人常见的原发性眼内恶性肿瘤,特点为恶性程度高、易侵袭转移、预后极差,严重影响患者视力,甚至威胁患者生命。目前诊断CM主要依赖影像学检查,在眼球摘除手术后加做病理诊断,缺乏明确的术前病理诊断。本研究旨在探索液基细胞学涂片和细胞蜡块技术在CM术前诊断中的应用。方法:收集南京医科大学第一附属医院2023年3至6月收治的2例临床诊断为CM患者的脉络膜下液。采用液基细胞学涂片方法进行初步诊断,改良的细胞蜡块制作技术、苏木精-伊红(hematoxylin and eosin,HE)染色、脱黑色素和免疫组织化学(immunohistochemistry,IHC)染色进行进一步的病理诊断。结果:2例患者经过影像学检查均诊断为CM,通过液基细胞学涂片做出初步的细胞学病理诊断,1例诊断为“黑色素瘤”,另1例诊断为“见异型细胞,黑色素瘤不除外”。通过改良的细胞蜡块制作技术,HE、脱黑色素和IHC染色,病理诊断结果显示临床诊断相同的2例患者,1例明确诊断为CM,而另1例诊断为低分化神经内分泌癌,修正了原先的诊断。结论:本改良技术能够在手术前精准诊断CM,为临床眼科医生制定治疗方案提供重要依据,操作简便,值得推广。其有3个优点:1)能制作出10~20张连续切片,满足IHC染色的要求;2)在用本技术处理的切片中,可见各种异型细胞,且细胞核结构清晰;3)简单易行,成本不高,适用于各级医院,特别是中小医院。本文有2个原创点:1)将液基细胞学涂片、细胞蜡块切片及IHC染色用于诊断CM;2)对传统的细胞蜡块制作技术进行改良,使其适用于诊断CM。展开更多
文摘<b><span>Background:</span></b><span> Liquid-based cytology (LBC) is a method of manufacturing cyto-diagnostic specimens. Improved accuracy is expected from standardizing specimen production and use of this method is rapidly spreading in oral cytology. On the other hand, LBC reportedly requires training to show peculiar cell findings compared to those of conventional smear cytology (CVC). Few studies have compared detailed cell findings for oral CVC and LBC.</span><span> </span><b><span>Objec</span></b><b><span>tives:</span></b><span> The aim of this study was to compare cytological findings between CVC </span><span>and LBC using cytomorphological image analysis.</span><span> </span><b><span>Materials and Methods:</span></b><span> Cytological specimens were collected from 20 patients (negative for squamous neoplasia in 10, dysplasia in 5, squamous cell carcinoma in 5) and 5 controls of the tongue between January 2017 and December 2018. Two different preparation techniques were investigated cytomorphologically for CVC and LBC (BD Cytorich</span><sup><span style="vertical-align:super;">TM</span></sup><span>).</span><span> </span><b><span>Results:</span></b><span> LBC showed significantly higher cell numbers tha</span><span>n CVC for all lesions. LBC-to-CVC ratio ranged from 9.52 (hyp</span><span>erkeratosis) to 1.87 (deep cells in oral squamous cell carcinoma (OSCC)). Nuclear area of </span><span>normal, hyperkeratosis, and inflammation were significantly higher in LBC tha</span><span>n those of CVC. Hyperchromasia was significantly more frequent with </span><span>CVC than with LBC for hyperkeratosis, inflammation, dysplasia and OSCC. There was no significant difference in circularity between CVC and LBC </span><span>among all lesions. </span><b><span>Conclusion:</span></b><span> Only one cytomorphological disadvantage was </span><span>se</span><span>en with LBC, in the form of decreased hyperchromasia. Further </span><span>clarification of the advantages and disadvantages of LBC is needed, including management of precision and screening practices.
文摘Cancer of the corpus uteri remains the most common gynecological related cancer in developed countries. Cytology, after the induction of liquid based cytology, has reemerged as a possible first line non-interventional diagnostic procedure with promising results. Apart from slide preparation for cytology diagnosis, LBC allows the application of elaborate molecular tests on the residual material. Samples from 74 symptomatic women were collected in ThinPrep?PreservCyt medium, from witch immunocytochemical and molecular tests were performed. Final diagnosis of 39 endometrioid carcinomas, 20 non-endometrioid carcinomas and 15 non-malignant was set after hysterectomy. Topoisomerase IIa expression was common (42%) in both types of cancer. Promoter methylation analysis revealed that hMLH1 is commonly methylated in cancers (52.7%), CDKN2A and MGMT less often (27.1%) and RARB rarely methylated (8.4%). BRAF activating mutation V600E was a rare event (8.4%) only found in low grade endometrioid carcinomas. Topoisomerase IIa expression correlated with BRAF mutations, hMLH1 and to lesser extent with CDKN2A methylation. Almost none of the biomarkers were positive in cytological negative or hyperplastic without atypia samples. Detection of methylation in any gene displayed sensitivity, specificity, PPV and NPV similar to cytology of cancer. However, inclusion of cytology diagnosis of hyperlasias with atypia increased sensitivity and NPV of cytology outperforming methylation of any gene. Further evaluation of the panel of promoter methylation, especially in cytology diagnoses of hyperplasia with or without atypia should be evaluated since initial results are promising. Even though methylation of MGMT and RARB are rare events, some patients could be benefit from specific chemotherapeutics that target either of them or the more frequently expressed topoisomerase IIa.
文摘This study examined cells contained in needles used for the collection of breast fine needle aspirates for the detection of malignant cells trapped in the needles. Remnants of cells contained in 50 needles used for the collection of scanty breast fine needle aspirates were examined by the liquid based cytology technique and compared with the conventional cytological technique of specimens in the corresponding syringes. The breast specimens were collected with clean sterile needles attached to the syringes. Smears were made and stained by the conventional method. The needles were removed from the syringes and a fixative was withdrawn into the syringes and the syringes were recapped with the needles. The fixative containing the specimen was then completely discharged into a centrifuge tube through the needles and treated by the liquid based cytology technique. The study revealed that cells were found trapped in all the needles used for the collection of breast FNA. 6% of them were positive for malignancy, similar to results obtained in the conventional method. Needles used for the collection of breast FNA should be examined before malignancy is completely ruled out particularly in extremely scanty specimens with a clinical suspicion of malignancy.
文摘Background: The detection of vaginal intraepithelial neoplasia (VAIN) in cervical samples is not a common finding. Therefore, we aimed to report VAINs detected in liquid-based cytology (LBC) from women examined at Hospital das Clínicas of Faculty of Medicine, Sao Paulo State University. Materials and Methods: We evaluated LBC samples from women referred to gynecology examination for different reasons (previous abnormal PapTest, follow up of treated cervical lesion, ecc) and women examined for regular screening proposals, and compared with biopsy diagnoses, including the controversial diagnoses of vaginal intraepithelial neoplasia (VAIN). Results: From 1866 patients, 1423 (76.3%) cases were negative and 443 (23.7%) were positive for any cellular alteration. Age of patients ranged from 12 to 86 years. We detected 25 histologically confirmed VAIN (1.3% p = 0.0002 by Fisher’s exact test IC 95% 0.0090 - 0.0198) and 1.1% VAIN (p = 0.0031 by Fisher’s exact test IC 95% 0.0077 - 0.0179). Conclusion: The identification of VAIN in routine is feasible;the professionals involved with cytological examination should be aware of these lesions in Pap test samples.
文摘目的探索并验证基于华为云ModelArts平台构建的深度学习模型在宫颈液基细胞学(liquid-based cytology,LBC)非典型细胞诊断中的应用价值,并评估其对不同诊断经验医师的辅助效果。方法回顾性分析2020年东莞市人民医院1044例宫颈脱落细胞学标本,采用华为云ModelArts平台开发的人工智能(artifical intelligence,AI)辅助诊断系统与初级、中级、高级医师进行诊断比对,计算灵敏度、特异度、精确率、符合率、曲线下面积(area under the curve,AUC)等指标,评估AI系统的诊断效能及其对不同年资医师的辅助诊断效果。采用McNemar检验比较AI系统与人工诊断的差异。结果在1044例宫颈脱落细胞学标本中,AI系统在非典型细胞检出的灵敏度和特异度分别为98.96%和89.15%,均高于初级医师(81.95%和91.81%)。AI系统的总体诊断精确率为93.68%,显著高于初级医师(87.26%,P<0.001)。AI辅助可显著提高初级医师的诊断性能,灵敏度从80.1%提升至96.5%,特异度从85.6%提升至92.3%。结论本研究构建的AI辅助宫颈细胞学诊断系统性能优越,尤其能显著提高初级医师的诊断水平,具有良好的临床应用前景。
文摘目的探讨在HPV阳性女性中,液基细胞学、DNA倍体分析及P16/Ki-67双染检测对宫颈癌前病变的分流作用。方法回顾性分析2021年5月至2022年12月在我院妇科行阴道镜及宫颈活检的妇女590例。患者高危人乳头瘤病毒(human papilloma virus,HPV)检测阳性,且行液基细胞学(liquid-based cytology,LBC)、DNA倍体分析、P16/Ki-67双染3种检查,对上述3种方法的灵敏度、特异性、受试者工作特征(receiver operating characteristic,ROC)曲线进行统计分析。结果液基细胞学、DNA倍体分析和P16/Ki-67双染3种筛查方法对宫颈癌前病变的灵敏度分别为84.2%、77.5%、76.4%,特异性分别为40.7%、49.2%、70.1%,曲线下面积(area under the curve,AUC)分别是0.625、0.634、0.733,其中,P16/Ki-67双染检测显著优于液基细胞学检查及DNA倍体分析(P<0.0001)。结论本研究认为,在HPV阳性女性中,P16/Ki-67双染检测的分流效果最佳。
文摘目的:脉络膜黑色素瘤(melanoma of choroid,CM)是成人常见的原发性眼内恶性肿瘤,特点为恶性程度高、易侵袭转移、预后极差,严重影响患者视力,甚至威胁患者生命。目前诊断CM主要依赖影像学检查,在眼球摘除手术后加做病理诊断,缺乏明确的术前病理诊断。本研究旨在探索液基细胞学涂片和细胞蜡块技术在CM术前诊断中的应用。方法:收集南京医科大学第一附属医院2023年3至6月收治的2例临床诊断为CM患者的脉络膜下液。采用液基细胞学涂片方法进行初步诊断,改良的细胞蜡块制作技术、苏木精-伊红(hematoxylin and eosin,HE)染色、脱黑色素和免疫组织化学(immunohistochemistry,IHC)染色进行进一步的病理诊断。结果:2例患者经过影像学检查均诊断为CM,通过液基细胞学涂片做出初步的细胞学病理诊断,1例诊断为“黑色素瘤”,另1例诊断为“见异型细胞,黑色素瘤不除外”。通过改良的细胞蜡块制作技术,HE、脱黑色素和IHC染色,病理诊断结果显示临床诊断相同的2例患者,1例明确诊断为CM,而另1例诊断为低分化神经内分泌癌,修正了原先的诊断。结论:本改良技术能够在手术前精准诊断CM,为临床眼科医生制定治疗方案提供重要依据,操作简便,值得推广。其有3个优点:1)能制作出10~20张连续切片,满足IHC染色的要求;2)在用本技术处理的切片中,可见各种异型细胞,且细胞核结构清晰;3)简单易行,成本不高,适用于各级医院,特别是中小医院。本文有2个原创点:1)将液基细胞学涂片、细胞蜡块切片及IHC染色用于诊断CM;2)对传统的细胞蜡块制作技术进行改良,使其适用于诊断CM。
