RESUMO
Intraductal papillary-mucinous tumor (IPMT) is defined as a syndrome consisting of dilatation of the main pancreatic duct and/or branch ducts associated with mucin overproduction. The purpose was to evaluate the usefulness of different imaging techniques (CT, EUS, ERCP) for determination of tumor invasion and pancreatic extension. Diagnosis often is delayed because it is confused with chronic pancreatitis or cystic neoplasms of the pancreas. It is difficult to rule out invasive malignancy. MRCP can be an essential imaging modality because it is a non-invasive technique. Intraductal ultrasound or pancreatoscopy could become in the future an additional useful preoperative procedure. A high frequency of invasive carcinoma in patients operated for pancreatic IPMT is observed. Surgical resection should be extended until a normal tissue margin is encountered.
Assuntos
Adenocarcinoma Mucinoso/diagnóstico , Carcinoma Ductal Pancreático/diagnóstico , Carcinoma Papilar/diagnóstico , Neoplasias Pancreáticas/diagnóstico , Adenocarcinoma Mucinoso/classificação , Adenocarcinoma Mucinoso/epidemiologia , Adenocarcinoma Mucinoso/terapia , Carcinoma Ductal Pancreático/classificação , Carcinoma Ductal Pancreático/epidemiologia , Carcinoma Ductal Pancreático/terapia , Carcinoma Papilar/classificação , Carcinoma Papilar/epidemiologia , Carcinoma Papilar/terapia , Colangiografia , Colangiopancreatografia Retrógrada Endoscópica/métodos , Colangiopancreatografia Retrógrada Endoscópica/normas , Diagnóstico Diferencial , Endossonografia/métodos , Endossonografia/normas , Humanos , Imageamento por Ressonância Magnética/métodos , Imageamento por Ressonância Magnética/normas , Neoplasias Pancreáticas/classificação , Neoplasias Pancreáticas/epidemiologia , Neoplasias Pancreáticas/terapia , Prognóstico , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Tomografia Computadorizada por Raios X/métodos , Tomografia Computadorizada por Raios X/normasRESUMO
The authors report a case of right atrial angiosarcoma in a 29 year old man presenting with massive pericardial effusion. This case illustrates the value of MRI in the preoperative evaluation, providing accurate information about the site and extension of the tumor, and even about the malignant nature of the lesion. Multiplanar transesophageal echocardiography did not provide any additional information in this case.
Assuntos
Neoplasias Cardíacas/diagnóstico , Hemangiossarcoma/diagnóstico , Imageamento por Ressonância Magnética , Adulto , Diagnóstico Diferencial , Ecocardiografia Transesofagiana , Seguimentos , Átrios do Coração , Neoplasias Cardíacas/cirurgia , Hemangiossarcoma/cirurgia , Humanos , Masculino , Invasividade Neoplásica , Neoplasia Residual , Derrame Pericárdico/diagnósticoRESUMO
Triple-differential cross sections of charged pions were measured for collisions of Ne projectiles at E/A = 800 MeV with NaF, Nb, and Pb targets. The reaction plane was estimated event by event from the light-baryon momentum distribution. For heavy targets, preferential emission of charged pions away from the interaction zone towards the projectile side was observed in the transverse direction. Such a preferential emission, which is not predicted by cascade calculations, may be attributed to a stronger pion absorption by the heavier spectator remnant.