Frecuencia de virus papiloma humano en tumores no ginecológicos de la Región de la Araucanía, Chile / Human papilloma virus frequency in non-gynecological tumors in the Araucanía Region, Chile

El Virus Papiloma Humano (HPV por sus siglas en inglés) es una de las infecciones de transmisión sexual más frecuentes del mundo y se encuentra presente en la mayoría de los cánceres de cuello uterino. Se ha descrito su presencia en otros tipos de cáncer no ginecológicos como lo son esófago y próstata. Sin embargo, las frecuencias de HPV descritas hasta el momento para estos tipos de cáncer son muy variables, y no hay artículos donde se muestren la presencia de HPV en estas neoplasias en Chile. El objetivo de este estudio fue determinar la frecuencia de HPV en muestras de biopsias de tumores no ginecológicos y tejido inflamatorio de pacientes de la región de La Araucanía. Se extrajo DNA desde un total de 47 biopsias de pacientes con esofagitis, 25 con carcinoma escamoso esofágico, 20 con hiperplasia nodular de la próstata y 39 con adenocarcinoma prostático. Estas fueron analizadas por PCR de la región L1 del virus y posterior genotipificación por reverse line blot. Se detectó HPV en el 53,2% de las muestras de esofagitis, 48% en muestras de carcinoma escamoso esofágico, 15% en hiperplasia nodular de la próstata y un 15,4% en los casos de adenocarcinoma prostático. Siendo los más frecuentes los genotipos de HPV 16 y 18, ya sea en infecciones simples o junto con otros genotipos, en lesiones preneoplásicas y neoplásicas de los tejidos estudiados. Existe una alta frecuencia de infección por HPV en biopsias de esofagitis y tejido inflamatorio esofágico de pacientes de la región de la Araucanía. En los casos de adenocarcinoma prostático e hiperplasia nodular de la próstata se observa una baja frecuencia de HPV.

Human Papilloma Virus (HPV) is the most common sexually transmitted disease in the world and it is present in practically all cervical cancers. Its presence was described in other types of non-gynecologic cancer such as esophageal and prostate. However, HPV frequency described for these cancers is highly variable, and there are no articles describing the presence of HPV in these tumors in Chile. To determine HPV frequency in samples from biopsies of non-gynecological tumors and inflammatory tissue from patients in the Araucanía region, DNA was extracted from a total of 47 biopsies from patients with esophagitis, 25 with esophageal squamous cell carcinoma, 20 with prostate nodular hyperplasia and 39 with prostate adenocarcinoma. These were analyzed by PCR of HPV L1 region and subsequent genotyping by reverse line blot. HPV was detected in 53.2% of esophagitis samples, 48% in esophageal squamous cell carcinoma, 15% in prostatitis and 15.4% in cases of prostatic adenocarcinoma. The most frequent HPV genotypes were 16 and 18, either single or in combination with other genotype infections, in inflammatory tissue and neoplastic lesions. In patients of the Araucanía region, there is a high rate of HPV infection in biopsies obtained in esophagitis and esophageal inflammatory tissue. In cases of prostatic adenocarcinoma and prostate nodular hyperplasia a low rate of HPV was observed.

Papiloma esofágico: descripción de un caso, identificación molecular del virus del papiloma humano y revisión de la literatura / [Esophageal papilloma: case report, molecular identification of human papillomavirus and literature review].

sophageal squamous papilloma is an uncommon, usually asymptomatic, benign tumor of the squamous epithelium consisting of a raised, sessile, small and round (smooth or rough) lesion. The prevalence is between 0.01 and 0.45

of cases, with a male/female ratio of 3:1. The etiology and pathogenesis appear to be a mechanical or chemical irritation of the mucosa in addition to the presence of human papillomavirus (HPV), important agent in the evolution to a squamous carcinoma, especially HPV types 16 and 18. In this paper, we describe a case of esophageal papilloma whose diagnosis involved endoscopic images, pathological studies and detection of viral DNA by polymerase chain reaction. By using molecular techniques (PCR-RFLP) a profile consistent with HPV type 16 has been obtained. The patient underwent polypectomy and currently, after 3 years of diagnosis, he remains asymptomatic. This work is one of the first national reports of a patient with esophageal papilloma in which one of the most frequently HPV genotypes associated with esophageal carcinoma (HPV 16) has been detected.

Infección por papilomavirus humano y cáncer esofágico: reporte de caso / Human papillomavirus infection and esophageal cancer: a case report

Introducción. Actualmente se reportan más de 216 tipos de virus de papiloma humano (VPH), pero sólo 100 tipos han sido totalmente secuenciados. Son capaces de infectar las células de la capa basal de cualquier epitelio. Existe constancia del carácter oncogénico de los VPH. Objetivo. Describir con fines científico-documental para los profesionales y docentes un caso con infección esofágica por VPH y cáncer del esófago. Caso Clínico. Mujer de 63 años, raza negra, soltera, ama de casa, procedencia rural, fumadora, ingestión frecuente de bebida alcohólica. Cuatro meses antes del diagnóstico la paciente empieza a presentar de manera progresiva disfagia a sólidos y pérdida de peso. El estudio endoscópico alto demostró la presencia de una lesión proliferativa ulcerada en tercio medio del esófago. La biopsia esofágica demostró un carcinoma epidermoide. La citología sugestiva de infección por papilomavirus. Discusión. La papilomatosis esofágica previa con otros factores de riesgo contribuyó a la aparición del carcinoma esofágico. El estudio histopatológico concluyó el diagnóstico de carcinoma de células escamosas causado probablemente por infección por VPH. Conclusiones. La presente asociación es poco frecuente; pero posible de diagnosticar teniendo en cuenta la sospecha, factores de riesgo y recursos diagnósticos actuales.

Introduction. Currently over 216 types of human papillomavirus (HPV) have been reported, but only 100 have been fully sequenced. They are able to infect cells of the basal layer of any epithelium. Evidence of HPV oncogenicity has been found. Objective. To describe a case of esophageal HPV infection associated to cancer of the esophagus. Case report. 63 years-old, African and rural origin, single, female housewife with the habit of smoking and frequent ingestion of alcohol. Four months before the diagnosis was established, the patient began to gradually develop dysphagia to solids and weight loss. Upper endoscopy shows a proliferative ulcerated lesion in the middle third of the esophagus. Biopsy is consistent with esophageal squamous cell carcinoma. Cytology is suggestive of papillomavirus infection. Discussion. Prior esophageal papillomatosis and other risk factors contributed to the occurrence of esophageal carcinoma. Histopathology was consistent with the diagnosis of squamous cell carcinoma probably caused by HPV infection. Conclusion. The association between papilloma virus and esophageal cancer is rare but can be diagnosed if it is suspected and other risk factors are present, as well as if there is access to modern diagnostic means.

Human papillomavirus detection and p16 methylation pattern in a case of esophageal papilloma

Esophageal cancer is a prevalent cancer worldwide. Some studies have reported the possible etiology of human papillomavirus (HPV) in benign and malignant papillomas of the esophagus but the conclusions are controversial. In the present study, we investigated an esophageal papilloma from a 30-year-old male patient presenting aphasia. HPV DNA was detected by generic PCR using MY09/11 primers, and restriction fragment length polymorphism revealed the presence of HPV54, usually associated with benign genital lesions. Hypermethylation of the pINK4A gene was also investigated due to its relation to malignant transformation, but no modification was detected in the host gene. Except for an incipient reflux, no risk factors such as cigarette smoking, alcohol abuse or an infected sexual partner were recorded. Since esophageal lesions may have a malignant potential, HPV detection and typing are useful tools for patient follow-up.

association of beta-catenin gene mutations and human papillomavirus in carcinoma of esophagus in a high-risk population of India

Esophageai cancer [EC] is the sixth leading cause of death from cancer. In high-risk regions, squamous cell carcinoma is the most common type of EC, and its etiology remains poorly understood. It shows uneven geographical distribution in its occurrence, reflecting the influence of local environmental conditions, lifestyle and genetic predisposition in the development of the cancer. Kashmir, in the north of India, has been described as a high-risk area for esophageal squamous cell carcinoma [ESCC]. In the present investigation an attempt was made to study the role of p-catenin mutations and human papillomavirus in 62 ESCC patients from Kashmir. The hot spot mutation region of p-catenin exon 3 was evaluated in matched tumor and normal tissues using a combination of PCR-SSCP and direct sequencing. We used two different sets of consensus primers viz., GP5+ and GP6+; PGMY09 and PGMY11 in conjunction with reverse line blot assay to screen for human papillomavirus [HPV]. None of the tumors showed the presence of commonly reported mutations in p-catenin. In view of the fact that HPV has been linked to pathogenesis of EC, we screened all the tumor and control specimens for the presence of HPV and we didn't detect HPV in any of the matched tumor and control specimens in contrast to the positive controls we used. In conclusion our results suggest that squamous cell carcinoma of esophagus in Kashmir may arise independent of oncogenic p-catenin mutations and HPV is unlikely to be an etiologic factor for ESCC in this region

[Human papillomavirus in squamous cell carcinoma of esophagus in a high-risk population]

The role of human papillomavirus [HPV] in the etiology of esophageal squamous cell carcinoma [ESCC] is not clear. Previous studies have found highly variable [from 0% to 67%] prevalence of HPV in ESCC tumor. However, prevalence of HPV in ESCC tumor seems to be higher in areas with high incidence of ESCC, such as China and South Africa. Iran is one of the areas of the world with the highest rates of ESCC. However, no previous study has reported the prevalence of HPV in ESCC tumor tissues from Iran. In this study, we compared the prevalence of a common marker for the presence of HPV [MY09/MY11 consensus primers] and two markers for the presence of HPV-16 and HPV-18 [respective E6 /E7 primers] in tumor tissues from 38 ESCC cases and normal biopsied tissues from 38 Iranian individuals. 14 out of the 38 ESCC [36.8%] samples, but only 5 out of 38 control samples [13.2%] were positive for the common marker of HPV presence; this difference was statistically significant [p=0.02]. Five ESCC samples [13.2%] but none of the control samples were positive for HPV16 E6 /E7 gene [p=0.05]. Three of the ESCC samples [7.9%] and five of the control samples [13.2%] were positive for HPV18 E6 /E7 gene. Our data are consistent with HPV DNA studies conducted in other high-risk areas for ESCC. HPV should be considered as a potential factor responsible for the increased incidence of ESCC in Iran and other high-incidence areas of the world