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  • Human papillomavirus  (1)
  • Papillary growth pattern  (1)
  • 1
    ISSN: 1432-2307
    Keywords: Human papillomavirus ; p53 protein Sebaceous gland carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Twenty-one Japanese patients with sebaceous carcinoma of the eyelid were investigated for tumour incorporation of human papillomavirus (HPV) types-6, 11, 16, 18, 31, and/or 33 DNA by in situ hybridization with fluorescein isothiocyanate-labelled DNA probes, and for p53 protein accumulation by immunohistochemical analysis with an antibody to p53 protein. Thirteen tumours (61.9%), including 9 cases of multiple infections, were positive for HPV DNA. Positive signal in the nucleus was observed not only in the cancer cells, but also in the cells of surrounding normal sebaceous glands and epidermis. Positive nuclear staining of cancer cells with the antibody to p53 protein was detected in 12 cases (57.1%). p53 protein accumulation was more frequently observed in the clinically advanced cases, occasionally in association with recurrence and/or metastasis. Among the 12 p53-positive cases, 7 were also positive for the presence of HPV DNA. HPV infections exist in a high percentage of sebaceous carcinomas of the eyelid in Japan; the overexpression of p53 protein may be important in both carcinogenesis and progression.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-2307
    Keywords: Key words c-MET ; Renal cell carcinoma ; Chromophilic subtype ; Papillary growth pattern ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Various genetic changes are involved in human renal cell carcinomas (RCCs). However, the molecular events related to other cytomorphological subtypes of RCC are not well known, apart from the relationship between the von Hippel-Lindau tumour suppressor gene and clear cell subtype RCC. We examined the overexpression of several growth factor receptors immunohistochemically and analyzed their relationship to the cytomorphological characters in 120 cases of RCCs. These receptors included c-met proto-oncogene product (c-MET), epidermal growth factor receptor (EGFR) and transforming growth factor beta receptor II (TGFβR). The overexpression of c-MET was detected in all cases (20/20) of the tubulo-papillary growth type and 78.3% (18/23) of chromophilic cell subtype, resulting in a very significant associations between c-MET overexpression and tubulo-papillary growth RCCs (P〈0.0001), c-MET and chromophilic subtype RCCs (P〈0.0001), and c-MET and EGFR (P〈0.0001). EGFR overexpression was significantly associated with the compact growth RCCs (49/89, P〈0.0001), clear cell subtype RCCs (P〈0.005) and the overexpression of TGFβR (P〈0.0001). These results strongly suggest a close correlation between the overexpression of c-MET and development of the chromophilic subtype of RCC with papillary growth pattern. EGFR expression is closely related to the pathogenesis of the clear cell subtype of RCC with compact growth pattern. The overexpression of c-MET, EGFR, and TGFβR may have roles that are individually significant in the morphogenesis of RCC.
    Type of Medium: Electronic Resource
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