Detection of human papillomaviruses 16-18 in cervical cells by molecular hybridization: Relationship with morphonuclear cell image analyses.

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Pseudolymphomatous tattoo reaction

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Relationship between computerized morphonuclear image analysis and histopathologic grading of breast cancer.

A pilot study analyzed the relationship between several morphonuclear parameters and the Bloom-Richardson score for 37 invasive, not-otherwise-specified (NOS) ductal breast carcinomas. The SAM-BA 200 cell image processor and its software were used to measure the nuclear features on Feulgen-stained imprint smears. Two parameters representing the numbers of large and dense chromatin clots and two parameters describing the heterogeneity of the chromatin among nuclei in a specimen evolved in a continuous manner parallel with the Bloom-Richardson score from stages NOS-4 to NOS-8. The systematic measurement of these four parameters on a large series of breast cancers may be able to define an objective and reproducible "scale" of differentiation that could be a helpful tool for pathologists and clinicians.Comparative StudyJournal ArticleResearch Support, Non-U.S. Gov'tinfo:eu-repo/semantics/publishe

Inter-laboratory variability in the presence of human papillomavirus in normal and abnormal cervical cytology samples.

Introduction: Treatment of cervical carcinoma is affected by the stage of the disease, being most likely curable with early detection. High-risk human papillomavirus (HPV) infection and persistency are necessary to the development of precancerous and cancerous lesions leaving the possibility to detect in time cells progressing in at risk behaviour. Methods: This study documents the proportion of HPV DNA positivity in 906 samples with cytological result negative for intraepithelial lesion and malignancy (NILM), 220 atypical squamous cells of undetermined significance (ASC-US) samples and 211 low grade intraepithelial lesions (LSIL) samples collected from various pathological laboratories in Brussels, Belgium. Results: The proportion of samples harbouring one or more HPV types was 10.8% (95% confidence interval, 95% CI: 8.8-12.8) in NILM, 34.5% (95% CI: 27.6-40.3) in ASC-US, 54.3% (95% CI: 47.5-61.1) in LSIL, with significant variability of HPV proportion in ASC-US and LSIL between laboratories. Conclusion: This study provides an on-site picture, confirming an added value of HPV DNA detection.Journal ArticleSCOPUS: ar.jinfo:eu-repo/semantics/publishe

Characterization of human colorectal mucosa, polyps, and cancers by means of computerized morphonuclear image analyses

Fifty-eight Feulgen-stained imprint smears from freshly resected colorectal tissue were analyzed by means of a SAMBA 200 cell image processor to establish a quantitative grading of their evolution from normal to malignant mucosa on the basis of 15 morphonuclear parameters relative to morphometry (nuclear size), densitometry (DNA content), and texture (chromatin pattern). The colorectal samples belonged to six groups: normal mucosa from patients without (Group 1) or with (Group 2) colorectal cancer, adenomas (Group 3), and cancers corresponding to the three stages of the Dukes' classification (Groups 4 to 6). Results indicated that analysis of the morphonuclear parameters computed on 250 to 300 nuclei/cases objectively and quantitatively showed the adenoma-cancer sequence. This need for only a small number of nuclei to assess a highly efficient analysis created a preoperative investigative tool using cytologic smears during endoscopy. The authors also made preliminary data banks for objective and reproducible grading of unknown cases by comparisons (discriminant analyses) with their contents. This approach must be validated prospectively on a large series of cases to furnish a system for colorectal malignancy diagnosis.Journal ArticleResearch Support, Non-U.S. Gov'tSCOPUS: ar.jFLWINinfo:eu-repo/semantics/publishe

Detection of human papillomaviruses 16-18 in cervical cells by molecular hybridization: relationship with morphonuclear cell image analyses.

Forty-one Feulgen-stained cervical imprint smears were analyzed by means of the SAMBA 200 cell image processor in order to quantitatively score human papillomavirus (HPV) 16-18-induced morphonuclear modifications as assessed by morphometric, densitometric, and textural parameters. Molecular hybridization technology using 16 and 18 type specific genetic probes made it possible to divide our series into three groups: Group 1, containing noninfected smears; Group 2, containing "suspicious", i.e. borderline positive, smears; and Group 3, those related to infected patients. Our results show that nuclei from infected smears are much more hyperchromatic and bigger than those arising from noninfected smears. This quantitative description of HPV 16-18-induced chromatin modifications enabled us to create preliminary data banks which could lead to an objective and reproducible grading of unknown cases. This approach is now being prospectively assessed on a large series of cases because the value of the current study is limited until the data bank is tested against unknown specimens with a broader spectrum of HPV infection.Journal ArticleResearch Support, Non-U.S. Gov'tinfo:eu-repo/semantics/publishe

Severe X-linked chondrodysplasia punctata in nine new female fetuses

International audienceObjectivesConradi-Hunermann-Happle [X-linked dominant chondrodysplasia punctata 2 (CDPX2)] syndrome is a rare X-linked dominant skeletal dysplasia usually lethal in men while affected women show wide clinical heterogeneity. Different EBP mutations have been reported. Severe female cases have rarely been reported, with only six antenatal presentations. MethodsTo better characterize the phenotype in female fetuses, we included nine antenatally diagnosed cases of women with EBP mutations. All cases were de novo except for two fetuses with an affected mother and one case of germinal mosaicism. ResultsThe mean age at diagnosis was 22weeks of gestation. The ultrasound features mainly included bone abnormalities: shortening (8/9 cases) and bowing of the long bones (5/9), punctuate epiphysis (7/9) and an irregular aspect of the spine (5/9). Postnatal X-rays and examination showed ichthyosis (8/9) and epiphyseal stippling (9/9), with frequent asymmetric short and bowed long bones. The X-inactivation pattern of the familial case revealed skewed X-inactivation in the mildly symptomatic mother and random X-inactivation in the severe fetal case. Differently affected skin samples of the same fetus revealed different patterns of X-inactivation. ConclusionPrenatal detection of asymmetric shortening and bowing of the long bones and cartilage stippling should raise the possibility of CPDX2 in female fetuses, especially because the majority of such cases involve de novo mutations