Expression and clinical significance of CRABP1 and CRABP2 in non-small cell lung cancer.

The impairment of retinoic acid (RA)-dependent signaling is a frequent event during carcinogenesis. Cellular retinoic acid-binding proteins (CRABP1 and CRABP2) are important modulators of RA activity. Up to date, the role of these proteins in cancer progression remains poorly investigated.

Clinico-morphological analysis of the neuroendocrine neoplasms of the gastroenteropancreatic system.

Gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs) are unusual and rare epithelial tumors for which the diagnosis of the grade of malignancy and prognostic assessment on the basis ofhistology represent considerable challenges for the pathologist. In this study we conducted a retrospective analysis of the cell proliferation (Ki-67 nuclear antigen) in primary and metastatic GEP NENs of 137 patients as well as the assessment of keratin 19 (CKI9) and progesterone receptors (PR) expression in pancreatic NENs of 57 patients. In 19 (27,1%) GEP NEN metastases was found I,5-4,5-fold increase of Ki-67 index compared with their primaries.

CRABP1 provides high malignancy of transformed mesenchymal cells and contributes to the pathogenesis of mesenchymal and neuroendocrine tumors.

CRABP1 (cellular retinoic acid binding protein 1) belongs to the family of fatty acid binding proteins. Retinoic acid binding is the only known functional activity of this protein. The role of CRABP1 in human carcinogenesis remains poorly understood.

[Expression of estrogen receptors beta and beta1 in tissue of human non-small cell lung cancer].

Comparability of the level and intensity of estrogen receptors beta (ERbeta) expression in non-small cell lung cancer tissue of 32 patients was analyzed by flow cytometry using various antibodies--to the total fraction of ERbeta (clone 14C8) as well to the full-length ERbeta1 isoform (clone EMRO2). The differences in the ER expression indexes detected by anti-ERbeta or anti-ERbeta1 antibodies were revealed in some patients, but it had no influence on average indexes of the ERbeta expression in the patient groups investigated. It was confirmed by the findings on more frequent and more intensive expression of ERbeta in the non-small cell lung cancer tissue of female patients vs.

[Immunohistochemical study of epidermal growth factor receptor expression in esophageal squamous cell carcinoma].

Primary tumors from 31 patients with esophageal squamous cell carcinoma (ESCC) were immunohistochemically studied for the expression of markers of ESCC in order to define the clinical value of the levels of EGFR and HER-2 in the tumors. EGFR and HER-2 hyperexpression in the tumors of patients with ESCC was ascertained to be an important marker for the analysis of the clinical features of ESCC. There was an association of the elevated levels of EGFR and HER-2 in the tumors of ESCC patients with the presence of vascular tumor invasion (p = 0.

Squamous cell carcinoma of the esophagus: evaluation of the status of epidermal growth factor receptors (EGFR and HER-2) by immunohistochemistry and in situ hybridization.

We performed a parallel evaluation of the status of epidermal growth factor receptors EGFR and HER-2 in tumor samples from 31 patients with squamous cell carcinoma of the esophagus. Hyperexpression of proteins was detected by immunohistochemical methods and gene amplification and other chromosome abnormalities were studied using FISH reaction. Evaluation of EGFR status showed that amplification of EGFR gene was present in 25% cases and chromosome 7 polysomy was detected in 29.

[Actins and keratins in the diagnosis of human basal-like breast cancer].

The most common forms of luminal breast cancer (BC) were compared with basal-like and Her2/neu3+ BC. Their primary classification was based on morphological diagnosis and the expression of estrogen receptor (ER), progesterone receptor (PR), and Her2/neu receptors. Monoclonal antibodies to actins and keratins were used for the study.

Clinical significance of hyperexpression of epidermal growth factor receptors (EGFR and HER-2) in esophageal squamous cell carcinoma.

Immunohistochemical study of marker expression in primary tumors of patients with esophageal squamous-cell carcinoma was carried out in order to evaluate prognostic significance of EGFR and HER-2 levels in the tumors. Hyperexpression of EGFR and HER-2 in the tumors is an important marker for the analysis of prognosis and clinical course of the disease. A relationship between high levels of EGFR and HER-2 in the tumors of patients with esophageal squamous-cell carcinoma and intravascular tumor invasion (p=0.

Epidemiological, clinical and viral determinants of the increased prevalence of high-risk human papillomavirus (HPV) infections in elderly women.

Background: Population-based studies have reported a second peak of human papillomavirus (HPV) prevalence among women > 55 years, but reasons for this U-shaped HPV prevalence curve are poorly understood.

Objectives: To analyse determinants of high-risk HPV (HR-HPV) infections among postmenopausal women.

Study Design And Methods: A cohort of 3,187 women was stratified into three age categories: i) youngest age group < 25 years (n = 1.

Age at menarche is not an independent risk factor for high-risk human papillomavirus infections and cervical intraepithelial neoplasia.

Data are controversial as to the role of menarche age as a risk factor of high-risk human papillomavirus (HR-HPV) infections. The objective of this study was to analyse the risk estimates for age at menarche as determinant of cervical intraepithelial neoplasia (CIN) and HR-HPV infections. A cohort of 3187 women were stratified into three groups according to their age at menarche: (i) women <13 years of age; (ii) those between 13 and 14 years and (iii) women >15 years of age.

Soluble fragment of HER2/neu receptor in the serum of patients with breast cancer with different levels of this protein expression in the tumor.

Serum level of soluble HER2/neu in patients with tumors characterized by high expression of this protein (2+/3+ according to immunohistochemical analysis) was significantly higher than in patients with low expression of HER2/neu and in women with benign diseases of the mammary glands. The level of HER2/neu in the serum decreased after removal of the primary tumor in the majority of patients.

Smoking is an independent risk factor for oncogenic human papillomavirus (HPV) infections but not for high-grade CIN.

Background: Recent evidence implicates smoking as a risk factor for cervical cancer (CC), but the confounding from high-risk human papillomavirus (HPV) infections is not clear.

Objectives: To analyse the role of smoking as an independent predictor of CIN2+ and HR-HPV infections in a population-based prospective (NIS, New Independent States of former Soviet Union) cohort study.

Study Design And Methods: A cohort of 3,187 women was stratified into three groups according to their smoking status: (i) women who never smoked; (ii) those smoking in the past; and (iii) women who are current smokers.

Oral contraceptives are not an independent risk factor for cervical intraepithelial neoplasia or high-risk human papillomavirus infections.

Background: Oral contraception (OC) has been proclaimed by the IARC as a risk factor of cervical cancer (CC), on prolonged use by high-risk human papillomavirus (HPV) positive women. However, the available data are far from complete, and more evidence is necessary on the potential confounding effects of sexual behavior and HPV infection. The aim of the present was study to analyse the risk estimates for OC users in order to develop several intermediate end-point markers in cervical carcinogenesis.

Human papillomavirus testing and conventional pap smear cytology as optional screening tools of women at different risks for cervical cancer in the countries of the former soviet union.

Objectives: Human papillomavirus (HPV) infection is a sexually transmitted disease (STD) and the single most important etiological agent of cervical cancer. In parallel with the increase of STDs and because of the lack of any organized cancer screening in the new independent states of the former Soviet Union, the incidence and mortality rates of cervical cancer are rapidly rising. This is the first report from an ongoing European Commission-funded (INCO-Copernicus Program) cross-sectional and cohort study (focused on the key issues of this major health problem in the new independent states) analyzing the performance of the HPV DNA (Hybrid Capture II) test as a potential screening tool for cervical cancer in these countries.

[Female genital tract polyneoplasia: primary multiple neoplasms or metastases?].

The analysis of 49 cases of synchronous and metachronous malignant mucinous tumors of the colon (rectum) and ovaries in the patients treated in 1990 to 2004 again has confirmed the data that metastatic ovarian cancer occurs from a primary focus in the colorectal region. Immunohistochemical studies (using cytokeratin 7 and cytokeratin 20) may be used in the differential diagnosis of ovarian mucinous ovarian carcinoma from metastatic colonic mucinous tumors.

Factors predicting persistence of high-risk human papillomavirus (HPV) infections in women prospectively followed-up in three New Independent States (NIS) of the former Soviet Union.

Background: We completed an analysis of the factors predicting the persistence of high risk (HR) HPV infections in women participating in a multicenter screening trial in three NIS countries.

Methods: The 543 baseline HR HPV-positive women included in this analysis are derived from a sub-cohort of 887 women who were prospectively followed-up for a mean of 21.6 months (range: 0.

[Infiltrating lobular breast cancer: histological and immunohistochemical characteristics].

Lobular carcinoma ranks second among most frequent tumors of the breast. Metastases to the lymph nodes and distant organs are one of the most important prognostic factors. 60% regional lymph node metastases were morphologically diagnosed during surgical removal of the tumor.

Clearance of high-risk human papillomavirus (HPV) DNA and PAP smear abnormalities in a cohort of women subjected to HPV screening in the New Independent States of the former Soviet Union (the NIS cohort study).

Background: We analysed the temporal relationships of the clearance of human papillomavirus (HPV) DNA and cytological abnormalities in women participating in a screening study in three NIS countries.

Methods: The 274 patients included in this analysis were prospectively followed-up for 21.6 months (range: 0.

[Combination of pulmonary lymphangioleiomyomatosis (LAM) with angiomyolipoma (AML) of the kidney and multilocular cystic nephroma].

A rare case of pulmonary LAM in combination with AML and multilocular cystic nephroma of the kidney in a 18-year-old female is described. Granules of the melanosomic type in AML, HMB-45 antigen and steroid receptors expression in LAM and AML were observed.

Acquisition of high-risk human papillomavirus infections and pap smear abnormalities among women in the New Independent States of the Former Soviet Union.

The rates of acquisition and the times of incident high-risk (HR) human papillomavirus (HPV) infections and Pap smear abnormalities and their predictive factors were analyzed in women participating in a multicenter screening study in three countries of the New Independent States of the former Soviet Union. The 423 patients were prospectively monitored for a mean of 21.6 months.

Phyllodes tumour: cytologic and histologic presentation of 22 cases, and immunohistochemical demonstration of p53.

A retrospective study of 22 cases of phyllodes tumour (PT) was undertaken to evaluate the potential value of fine needle aspiration (FNA) cytology in the diagnosis of benign and borderline PT. Histological material was available from 12 patients with typical benign PT (group 1), six patients with less typical changes (group 2) and four cases of borderline PT (group 3). Cytological presentation of PT in these cases was similar to that described by other cytologists, although abundant cellular material was obtained in only eight FNAs, naked nuclei were present in nine cases only, and atypical or suspicious cytological features were found in seven cases.

Elevated content of p53 protein in the absence of p53 gene mutations as a possible prognostic marker for human renal cell tumors.

p53 tumour suppressor gene expression was estimated immunohistochemically using DO-1 monoclonal antibody (recognising both wild-type and mutant p53 in 88 human renal tumours. Single strand conformation polymorphism (SSCP) analysis of possible mutations within exons 4-8 of the p53 gene was performed in 29 of the tumours (mostly immunostaining-positive cases). Obviously elevated p53 content was detected with DO-1 antibody in chromophobic cell carcinomas and most clear/chromophilic cell tumours (in chromophilic cell populations).