Introduction: Cholangioscopy is a test that allows the evaluation of the biliary epithelium. It is used for diagnosis and management of biliary diseases. Objectives: Determine the success rate of complete removal of difficult stones with the use of laser lithotripsy through cholangioscopy as well as its complications. Determine the visual impression accuracy of bile duct injuries. Materials and methods: This is a prospective and descriptive study. We included 39 patients between July 2016 and July 2017 with diagnosis of difficult stones in the biliary tract and indeterminate stenosis of the biliary tract that were submitted to cholangioscopy. Results: Success rate of complete removal of difficult stones was 65.3%, there was one complication. Two laser sessions were required in 4 of the 17 patients who obtained complete removal of the stones. The visual impression accuracy of lesio...

Se reportó un caso de varón de 52 años con historia de 3 meses caracterizada por pujo, tenesmo, hematoquezia, dolor al defecar, disminución de 18 kg de peso, fiebre, secreción fecaloidea y purulenta a través de orificio perianal. A la colonoscopía se evidencian múltiples úlceras en colon ascendente, transverso y descendente. También en recto se aprecia lesión elevada de aproximadamente 5 cm. Las biopsias de dichas lesiones fueron coloreadas con hematoxilina-eosina y tinción de Gomori- Grocott demostrando múltiples macrógafos conteniendo microorganismos compatibles con histoplasmosis. Las pruebas para ELISA VIH, HTLV I-II fueron negativas. La histoplasmosis del colon y recto en paciente inmunocompetente es extremadamente rara, habiéndose reportado pocos casos.