Assuntos
Biomarcadores Tumorais/genética , Análise Mutacional de DNA , Mieloma Múltiplo/genética , Plasmocitoma/genética , Neoplasias de Tecidos Moles/genética , Transcriptoma , Adulto , Idoso , Biópsia , Neoplasias Ósseas/diagnóstico , Neoplasias Ósseas/genética , Neoplasias Ósseas/patologia , Análise Citogenética , Análise Mutacional de DNA/métodos , Diagnóstico Diferencial , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Mieloma Múltiplo/diagnóstico , Mieloma Múltiplo/patologia , Plasmocitoma/diagnóstico , Plasmocitoma/patologia , Estudos Retrospectivos , Neoplasias de Tecidos Moles/diagnóstico , Neoplasias de Tecidos Moles/patologiaRESUMO
We aimed to determine the role of HPV in the pathogenesis and outcome of oropharyngeal squamous cell carcinoma (OSCC) in lifelong nonsmoking and nondrinking patients. A case-case analysis was performed to compare the presence of HPV-DNA in tumor cells of 16 nonsmoking and nondrinking with 16 matched smoking and drinking patients (matching criteria: age at incidence, gender, tumor sublocation, tumor stage). HPV was detected using 2 PCR tests, FISH analysis, and p16(INK4A) immunostaining. Nonsmoking and nondrinking patients had more HPV-positive tumors than smoking and drinking patients (n = 12; 75% versus n = 2; 13%; P < 0.001). All HPV-positive tumors showed p16(INK4A) overexpression, and 1 HPV-negative tumor had p16(INK4A) overexpression, (P < 0.001). Overall survival and disease-specific survival were higher for HPV-positive compared to HPV-negative cases (P = 0.027, P = 0.039, resp.). In conclusion, HPV is strongly associated with OSCC of nonsmoking and nondrinking patients. Specific diagnostic and therapeutic actions should be considered for these patients to achieve a better prognosis.
RESUMO
We have investigated the phenotype and ultrastructure of tumour cells from two cell lines each derived from a malignant fibrous histiocytoma (MFH) as a means of studying the histogenesis of this group of tumours. The first MFH (MFH-I) was of the pleomorphic subtype, with a predominantly histiocytic appearance, the second was of the pleomorphic subtype associated with myxoid and storiform areas (MFH-II). In vitro tumour cells from both neoplasms showed aberrant growth properties. Xenografts in nude mice from both neoplasms showed a similar histology to that of the original tumour. Both tumours showed hyaluronidase sensitive alcian blue staining. Phenotypic studies of the two cell lines and of the tumour tissues demonstrated that the cells differed in the presence of collagen types I and III. They did not show evidence of histiocytic, endothelial, leiomyoblastic, rhabdomyoblastic, lipoblastic of schwannian origin. Ultrastructurally, the two cell lines were found to be different. In vitro and in xenografts the cell type of MFH-I resembled a primitive mesenchymal cell. Whereas that of MFH-II resembled a fibroblast-like cell. We concluded that the group of MFH is heterogeneous and is probably derived from more than one progenitor cell.