Human papillomavirus (HPV) has been considered to be an etiological agent for anogenital cancers, such as cervical cancer and possibly a subset of cancers of the aerodigestive tract. The aim of the study was to evaluate the presence of human papillomavirus DNA in colorectal carcinomas and adenomas. Formalin-fixed and paraffin-embedded archival tissue samples were used for DNA extraction. One hundred and six colorectal carcinomas and 62 adenomas were screened by nested polymerase chain reaction (PCR) for HPV DNA with a control group of 49 cervical tissues with invasive cervical carcinoma and cervical intraepithelial neoplasia (CIN). In the study group, we did not find HPV DNA positivity in any of all the colorectal carcinomas and adenomas. In the control group with cervical lesions, 34 out of 49 (69.4%) samples were positive for the HPV DNA. These results indicated that there was no correlation between HPV infection and colorectal carcinomas and adenomas.

Inflammatory pseudotumor of the kidney is a very rare lesion. We report a patient who had a renal mass raising the suspicion of a malignant neoplasm and the pathologic examination revealed an inflammatory pseudotumor. Despite its rarity, inflammatory pseudotumor of kidney should be kept in mind in the differential diagnosis of a solitary renal mass.

It has been estimated that almost 10% of the worldwide cancer burden is linked to human papillomavirus (HPV) infection. Although the association between HPV and bladder carcinoma has been extensively investigated, data on the role of HPV in bladder carcinogenesis are controversial. The aim of the study was to assess the possible role of human papillomavirus in the development of urothelial bladder carcinomas. Formalin-fixed and paraffin-embedded archival tissue samples were used for DNA extraction. Seventy urothelial bladder carcinoma tissues were screened by nested-polymerase chain reaction (PCR) for HPV DNA with a control group of total 18 cervical tissues with invasive cervical carcinoma and cervical intraepithelial neoplasia III (CIN III). In the study group, we did not find HPV DNA positivity in any of the urothelial carcinomas. In the control group, 15 out of 18 (83.3%) samples were positive for the HPV DNA. These results indicated that there was no association between HPV infection and urothelial carcinomas.

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BackgroundEndometrial carcinoma (EC) is the most common malignancy of the female genital tract. Gene alterations and overexpression of various oncogenes are important in tumor development. The human HER 2 neu (c-erbB-2) gene product is a transmembrane receptor with an intracellular tyrosine kinase that plays an important role in coordinating the endometrial growth factor receptor signaling network. The aim of this study was to investigate the expression of c-erbB-2 in endometrial cancer, to study its correlation to established prognostic parameters and estrogen receptor (ER) and progesterone receptor (PR) status.MethodsImmunohistochemical (IHC) analyses of ER, PR and c-erbB-2 were performed in 72 EC cases.ResultsWe detected a positive staining with c erbB 2 in 18.1% of the cases and determined a statistically significant relation between c-erbB-2 and PR. We could not find a statistically significant relation between c-erbB-2 staining and ER. There was not a statistically significant difference between c-erbB-2 and histological grade. The highest level of c-erbB-2 was found in grade 2 cases. There was not any statistically significant relation between c-erbB-2 and menstrual status, myometrial invasion, lymph node status, stage and survival.ConclusionsAlthough our study provides additional evidence of the potential prognostic role of c-erbB-2, further prospective and controlled studies are required to validate their clinical usefulness.

Because precise differential diagnosis will alter the therapeutic approach and prognosis, it is necessary for treating physicians to be aware of these unusual presentations.

Several studies have suggested a possible role of human papillomavirus (HPV) in the pathogenesis of endometrial carcinoma. The aim of the study was to investigate the presence of HPV DNA in endometrium cancers and nonneoplastic endometrium. Sixty endometrial adenocarcinomas with and without squamous differentiation and the nonneoplastic endometrium tissue of fifty-six of the same patients were analyzed for the presence of family 16 and family 6 HPV DNA by using chromogenic in situ hybridization technique on formalin-fixed and paraffin-embedded archival samples, and the results were confirmed by polymerase chain reaction method. HPV DNA was not detected either in the endometrial adenocarcinoma with or without squamous differentiation, or in the nonneoplastic endometrium tissue. It appears that HPV does not play any role in the pathogenesis of endometrial carcinoma, since endometrium may not to be a suitable host for HPV replication.

Objectives: Meningiomas are generally benign central nervous system neoplasms, which frequently express progesterone receptor (PR) and rarely express the estrogen receptor (ER). The significance of Her-2/neu expression in meningiomas is unclear. We evaluated the correlation with Her-2/neu, PR, ER expressions and clinicopathologic parameters in World Health Organization (WHO) Grade I meningiomas. Patients and Methods:In total, 53 cases of meningiomas were included in this study. Formaline-fixed, paraffin-embedded tissue sections were immunostained for Her-2/neu, PR and ER.Results: Whereas 27 (50.9%) of meningiomas were positive for PR, no reaction was determined for ER. Her-2/neu overexpression was observed in 12 (22.6%) cases. There was positive correlation between Her-2/ neu and PR expressions (p=0.015). Her-2/neu expression was frequently seen in meningothelial type (p=0.03). There were no correlations with Her-2/neu, ER, PR and other clinicopathologic parameters. Conclusion:The results of our study show that despite there being PR expression at a high rate in grade I meningiomas, ER expression is a rare finding. Moreover, Her-2/neu expression has been detected more often in the PR positive and meningothelial type.