[Intraductal papillary mucinous neoplasm and recurrent pancreatitis]. / Neoplasia intraductal papilar quística mucinosa del páncreas y pancreatitis recurrente.

Ohashi described for the first time the IPMN on 1982 as a pancreatic neoplasia with mucine cells forming papillae and producing dilatation of the main pancreatic duct or its branches. The IPMN represent the 1% of the pancreatic tumors and 5% of the cystic neoplasias. It is potentially malignant in a period of five years being more frequent in males between 60-70 and clinically these patients' presents as acute, recurrent or chronic pancreatitis, with an incidence of malignancy from 25% to 70%. CT scan and cholangio MRI allows the diagnosis, the variety, localization and possibility of determine malignancy. The treatment is the Whipple resection. We are reporting the case of an obese middle age male, being observed along the last 10 years because of recurrent pancreatitis with a cystic lesion of the head of the pancreas. The CT scan, endoscopic-ultrasound and the analysis of the liquid content suggested a mucinous lesion, reason why the patient underwent a pancreatic-duodenal resection. The histology study confirms the diagnosis of IPMN.

Neoplasia intraductal papilar quística mucinosa del páncreas y pancreatitis recurrente / Intraductal papillary mucinous neoplasm

La neoplasia Intraductal papilar quística mucinosa (NIPM) fue descrita por primera vez en 1982 por Ohashi, como una neoplasia del páncreas caracterizada por una proliferación de células neoplásicas mucinosas, que forman papilas y causan dilatación del ducto principal o sus ramas. Las NIPM representan el 1% de las neoplasias pancreáticas y el 25% de las neoplasias quísticas. Son potencialmente malignas, progresan desde una lesión benigna hasta carcinoma en un promedio de 5 años. Afecta con mayor frecuencia al sexo masculino entre 60 y 70 años, con síntomas de pancreatitis crónica o pancreatitis aguda recidivante y se localiza preferentemente en la cabeza y proceso uncinado. La clasificación depende de su localización, en variante ducto principal, variante rama lateral o mixto y la importancia radica en el pronóstico, con incidencia de cáncer que varía de 25% a 70%. Las imágenes (T.E.M y Colangio RM) nos permiten establecer el diagnóstico, la variedad, la localización, la extensión y determinar indicios de benignidad o malignidad. Además la eco endoscopía nos permite obtener una muestra y poder estudiar el líquido del quiste. El tratamiento de estas neoplasias es la duodeno pancreatectomía de Whipple. Reportamos un paciente obeso, con historia de pancreatitis recurrente, observado a lo largo de 10 años por una lesión quística del páncreas que creció en los últimos 24 meses. El estudio eco endoscópico y el análisis del líquido del quiste orientó al diagnóstico de NIPM por lo que se le sometió a una resección duodeno pancreática con evolución favorable. El estudio histológico confirmó el diagnóstico de NIPM.

Ohashi described for the first time the IPMN on 1982 as a pancreatic neoplasia with mucine cells forming papillae and producing dilatation of the main pancreatic duct or its branches. The IPMN represent the 1% of the pancreatic tumors and 5% of the cystic neoplasias. It is potentially malignant in a period of five years being more frequent in males between 60-70 and clinically these patients’ presents as acute, recurrent or chronic pancreatitis, with an incidence of malignancy from 25% to 70%. CT scan and cholangio MRI allows the diagnosis, the variety, localization and possibility of determine malignancy. The treatment is the Whipple resection. We are reporting the case of an obese middle age male, being observed along the last 10 years because of recurrent pancreatitis with a cystic lesion of the head of the pancreas. The CT scan, endoscopic-ultrasound and the analysis of the liquid content suggested a mucinous lesion, reason why the patient underwent a pancreatic-duodenal resection. The histology study confirms the diagnosis of IPMN.

The Peru Urban versus Rural Asthma (PURA) Study: methods and baseline quality control data from a cross-sectional investigation into the prevalence, severity, genetics, immunology and environmental factors affecting asthma in adolescence in Peru.

OBJECTIVES: According to a large-scale international survey, Peru has one of the highest prevalences of asthma worldwide; however, data from this survey were limited to participants from urban Lima. The authors sought to characterise the epidemiology of asthma in Peru in two regions with disparate degrees of urbanisation. In this manuscript, the authors summarise the study design and implementation. DESIGN: A cross-sectional study. PARTICIPANTS: Using census data of 13-15-year-old adolescents from two communities in Peru, the authors invited a random sample of participants in Lima (n=725) and all adolescents in Tumbes (n=716) to participate in our study. PRIMARY AND SECONDARY OUTCOME MEASURES: The authors asked participants to complete a questionnaire on asthma symptoms, environmental exposures and socio-demographics and to undergo spirometry before and after bronchodilator, skin allergy testing and exhaled nitric oxide testing. The authors obtained blood samples for haematocrit, total IgE levels, vitamin D levels and DNA in all participants and measured indoor particulate matter concentrations for 48 h in a random subset of 70-100 households at each site. RESULTS: Of 1851 eligible participants, 1441 (78%) were enrolled and 1159 (80% of enrolled) completed all physical tests. 1283 (89%) performed spirometry according to standard guidelines, of which 86% of prebronchodilator tests and 92% of postbronchodilator tests were acceptable and reproducible. 92% of allergy skin tests had an adequate negative control. The authors collected blood from 1146 participants (79%) and saliva samples from 148 participants (9%). Overall amounts of DNA obtained from blood or saliva were 25.8 µg, with a 260/280 ratio of 1.86. CONCLUSIONS: This study will contribute to the characterisation of a variety of risk factors for asthma, including urbanisation, total IgE levels, vitamin D levels and candidate genes, in a resource-poor setting. The authors present data to support high quality of survey, allergic, spirometric and genetic data collected in our study.