RESUMEN
BACKGROUND: We conducted a large international study to estimate fractions of head and neck cancers (HNCs) attributable to human papillomavirus (HPV-AFs) using six HPV-related biomarkers of viral detection, transcription, and cellular transformation. METHODS: Formalin-fixed, paraffin-embedded cancer tissues of the oral cavity (OC), pharynx, and larynx were collected from pathology archives in 29 countries. All samples were subject to histopathological evaluation, DNA quality control, and HPV-DNA detection. Samples containing HPV-DNA were further subject to HPV E6*I mRNA detection and to p16(INK4a), pRb, p53, and Cyclin D1 immunohistochemistry. Final estimates of HPV-AFs were based on HPV-DNA, HPV E6*I mRNA, and/or p16(INK4a) results. RESULTS: A total of 3680 samples yielded valid results: 1374 pharyngeal, 1264 OC, and 1042 laryngeal cancers. HPV-AF estimates based on positivity for HPV-DNA, and for either HPV E6*I mRNA or p16(INK4a), were 22.4%, 4.4%, and 3.5% for cancers of the oropharynx, OC, and larynx, respectively, and 18.5%, 3.0%, and 1.5% when requiring simultaneous positivity for all three markers. HPV16 was largely the most common type. Estimates of HPV-AF in the oropharynx were highest in South America, Central and Eastern Europe, and Northern Europe, and lowest in Southern Europe. Women showed higher HPV-AFs than men for cancers of the oropharynx in Europe and for the larynx in Central-South America. CONCLUSIONS: HPV contribution to HNCs is substantial but highly heterogeneous by cancer site, region, and sex. This study, the largest exploring HPV attribution in HNCs, confirms the important role of HPVs in oropharyngeal cancer and drastically downplays the previously reported involvement of HPVs in the other HNCs.
Asunto(s)
Biomarcadores de Tumor/análisis , Carcinoma de Células Escamosas/química , Carcinoma de Células Escamosas/virología , Neoplasias Orofaríngeas/química , Neoplasias Orofaríngeas/virología , Papillomaviridae/aislamiento & purificación , Infecciones por Papillomavirus/complicaciones , Adulto , Anciano , Estudios Transversales , Ciclina D1/análisis , Inhibidor p16 de la Quinasa Dependiente de Ciclina/análisis , ADN Viral/aislamiento & purificación , Femenino , Genotipo , Neoplasias de Cabeza y Cuello/virología , Papillomavirus Humano 16/aislamiento & purificación , Humanos , Inmunohistoquímica , Cooperación Internacional , Masculino , Persona de Mediana Edad , Papillomaviridae/genética , Infecciones por Papillomavirus/virología , Valor Predictivo de las Pruebas , Proteínas Salivales Ricas en Prolina/análisis , Proteína p53 Supresora de Tumor/análisisRESUMEN
Pregnancy associated pyogenic granuloma of the oral cavity especially the gingivae is not uncommon. However, pyogenic granuloma of the lip associated with pregnancy is a very rare clinical condition. A case of a 29 year-old pregnant woman (35 weeks gestation) who presented with a pregnancy associated pyogenic granuloma of the lower lip is reported. Chronic irritation of the lower lip which acts in an unidentified way with high gingival level of active progesterone is the suspected pathogenesis. Surgical excision was the treatment of choice, and no recurrence was noted.
Asunto(s)
Granuloma Piogénico/cirugía , Enfermedades de los Labios/cirugía , Complicaciones del Embarazo/cirugía , Adulto , Femenino , Granuloma Piogénico/etiología , Granuloma Piogénico/patología , Humanos , Enfermedades de los Labios/patología , Embarazo , Complicaciones del Embarazo/etiología , Complicaciones del Embarazo/patología , Tercer Trimestre del Embarazo , Resultado del TratamientoRESUMEN
BACKGROUND: Tumours arising from odontogenic tissues are rare and constitute a heterogenous group of interesting lesions. The aim of this study was to determine the relative frequency of odontogenic tumors (OT) among Nigerian children and adolescents 19 years or younger. PATIENTS AND METHODS: The histopathology records were retrospectively reviewed for all the tumors and tumor-like lesions of the oral cavity and the jaws seen in children and adolescents