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Introducción. La hidatidosis biliar es la complicación más frecuente de la hidatidosis hepática. La colangiopancreatografía retrógrada endoscópica desempeña un papel clave en el tratamiento. Caso clínico. Femenina de 57 años acude por dolor abdominal, vómito, diarrea, leucocitosis, hiperbilirrubinemia, en colangioresonancia magnética presenta vía biliar dilatada, defecto de señal en tercio proximal y distal. La colangiopancreatografía retrógrada endoscópica evidencia presencia de cuerpo extraño de aspecto de membranas, vía biliar dilatada, se extrae quistes de aspecto parasitario. Conclusión. El tratamiento de elección es quirúrgico y farmacológico, la colangiopancreatografía retrógrada endoscópica antes de la cirugía, asegura la extracción del material hidatídico y trata la obstrucción biliar, identifica el trayecto fistuloso y facilita su cierre mediante colocación de prótesis y esfinterotomía, por lo que constituye un tratamiento no quirúrgico efectivo y con margen amplio de seguridad.

Introduction: Biliary hydatid disease is the most common complication of hepatic hydatid disease. Endoscopic retrograde cholangiopancreatography plays a key role in treatment. Clinical case: A 57-year-old female presented with abdominal pain, vomiting, diarrhea, leukocytosis, mixed hyperbilirubinemia, and magnetic resonance cholangiography showed a dilated bile duct and a signal defect in the proximal and distal third. Endoscopic retrograde cholangiopancreatography shows the presence of a foreign body with a membrane appearance, a dilated bile duct, and cysts with a parasitic appearance. Conclusion: The treatment of choice is surgical and pharmacological, endoscopic retrograde cholangiopancreatography before surgery ensures the extraction of hydatid material and treats biliary obstruction, identifies the fistulous tract and facilitates its closure by placing a prosthesis and sphincterotomy, which is why it constitutes a Effective non-surgical treatment with a wide margin of safety.

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Hilar cavernous transformation is the formation of venous structures rich in collateral around the portal vein. Portal vein thrombosis is a rare entity. Although there are many reasons for its etiology, few cases have been reported secondary to hydatid cysts in the liver. Here, we present a 24-year-old patient with complaints of abdominal pain and swelling. Her CT and MRI scans show cholelithiasis with portal vein thrombosis and hilar cavernous transformation due to giant hydatid cyst compression in the lateral liver sector.

La transformación cavernosa hiliar es la formación de estructuras venosas ricas en colaterales alrededor de la vena porta. La trombosis de la vena porta es una afección poco frecuente. Aunque existen muchas razones en su etiología, se han descrito pocos casos secundarios a quiste hidatídico en el hígado. Aquí se presenta el caso de una paciente de 24 años con quejas de dolor abdominal e hinchazón. La tomografía computarizada y la resonancia magnética mostraron colelitiasis con trombosis de la vena porta y transformación cavernosa hiliar por compresión del quiste hidatídico gigante en el sector lateral del hígado.

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Introducción. La hidatidosis o equinococosis es una zoonosis parasitaria que se adquiere al ingerir huevos de cestodos del género Echinococcus. El diagnóstico clínico raramente se hace en sitios no endémicos. La mayoría de los pacientes se encuentran asintomáticos y los hallazgos incidentales en los estudios de imágenes o en procedimientos quirúrgicos permiten la sospecha diagnóstica. Caso clínico. Paciente masculino de 70 años, residente en área rural del municipio de Puerto Libertador, departamento de Córdoba, Colombia, quien consultó por masa abdominal en epigastrio y mesogastrio, parcialmente móvil e indolora. Resultados. En cirugía se identificaron lesiones quísticas mesentérica y hepática. Después de la cirugía y mediante estudios de inmunohistoquímica, se confirmó el diagnóstico de quiste hidatídico. El paciente tuvo una evolución satisfactoria. Conclusión. La hidatidosis quística mesentérica y hepática sintomática es una enfermedad rara en sitios no endémicos, donde la cirugía constituye un pilar fundamental en el diagnóstico y tratamiento, sumado al manejo médico farmacológico.

Introduction. Hydatidosis or echinococcosis is a parasitic zoonosis that is acquired by ingesting eggs of cestodes of the genus Echinococcus. Clinical diagnosis is rarely made in non-endemic sites. Most patients are asymptomatic and incidental findings on imaging studies or surgical procedures allow for diagnostic suspicion. Clinical case. A 70-year-old male patient, resident in a rural area of the municipality of Puerto Libertador, department of Córdoba, Colombia, who consulted for an abdominal mass in the epigastrium and mesogastrium, partially mobile and painless. Results. In surgery, mesenteric and hepatic cystic lesions were identified. After surgery and through immunohistochemistry studies, the diagnosis of hydatid cyst was confirmed. The patient had a satisfactory evolution. Conclusion. Symptomatic mesenteric and hepatic cystic hydatidosis is a rare disease in non-endemic sites, where surgery constitutes a fundamental pillar in the diagnosis and treatment in addition to pharmacological medical management.

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BACKGROUND Hepatic hydatidosis, or echinococcosis, is a zoonosis with worldwide prevalence and is potentially lethal in humans. This report presents a case of hydatidosis in a 40-year-old woman that was associated with a zoonotic transmission of Echinococcus granulosus from domestic dogs in an urban-marginal area of the city of Guayaquil, Ecuador. This report shows how early diagnosis and awareness favored the correct treatment of the disease. CASE REPORT A 40-year-old woman from the aforementioned sector presented the following symptoms: malaise, pain in the upper right hypochondrium, palpable mass, jaundice, and fever. Next, the patient's fecal samples were analyzed by direct coproparasitic methods, flotation, and sedimentation with centrifugation using saline solution, whereby the presence of Entamoeba histolytica eggs was determined. Likewise, she underwent an ultrasound, in which hepatic hydatid cysts were observed. Subsequently, the cysts were treated and surgically removed, and parasitic forms of E. granulosus were identified. Later, coproparasitic analysis of her 2 domestic dogs for coproantigen ELISA were performed, by which the presence of this cestode was also identified and confirmed. CONCLUSIONS Hydatidosis is a zoonosis that can affect the population, especially in endemic areas of developed and underdeveloped countries. In this case, hepatic hydatidosis was identified in a 40-year-old woman. Additionally, the presence of E. granulosus eggs was determined in the fecal matter of her dogs, which indicated that the patient's relatives and other people around them were exposed to this zoonosis.

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BACKGROUND: Hydatid disease, a parasitic infestation caused by Echinococcus granulosus larvae, is an infectious disease endemic in different areas, such as India, Australia, and South America. The liver is well known as the organ most commonly affected by hydatid disease and may present a wide variety of complications such as hepatothoracic hydatid transit, cyst superinfection, intra-abdominal dissemination, and communication of the biliary cyst with extravasation of parasitic material into the bile duct, also called cholangiohydatidosis. Humans are considered an intermediate host, exposed to these larvae by hand-to-mouth contamination of the feces of infected dogs. AIM: This study aimed to highlight the role of endoscopic retrograde cholangiopancreatography in patients with acute cholangitis secondary to cholangiohydatidosis. METHODS: Considering the imaging findings in a 36-year-old female patient with computed tomography and magnetic resonance imaging showing a complex cystic lesion in liver segment VI, with multiple internal vesicles and a wall defect cyst that communicates with the intrahepatic biliary tree, endoscopic biliary drainage was performed by endoscopic retrograde cholangiopancreatography with papillotomy, leading to the discharge of multiple obstructive cysts and hydatid sand from the main bile duct. RESULTS: Clinical and laboratory findings improved after drainage, with hospital discharge under oral antiparasitic treatment before complete surgical resection of the hepatic hydatid cyst. CONCLUSIONS: Endoscopic retrograde cholangiopancreatography is a safe and useful method for the treatment of biliary complications of hepatic hydatid disease and should be considered the first-line procedure for biliary drainage in cases of cholangiohydatid disease involving secondary acute cholangitis.

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El Paraguay integra la Iniciativa Sudamericana para el Control y Vigilancia de Equinococosis Quística. Con el fin de optimizar los informes epidemiológicos sobre hidatidosis, presentamostres casos clínicos vistos en centros nacionales y realizamos una revisión de la literatura local sobre el tópico. Desde 1969 hasta la fecha se describen 70casos de equinococosis quística. Se requieren estudios epidemiológicos sistemáticos para evaluar el grado de penetración, la distribución geográfica y las características de transmisión de esta enfermedad en nuestro país.Palabras clave: equinococosis;equinococosispulmonar; equinococosis hepática; equinococcus granulosus; zoonosis.

Paraguay is a member of the South American Initiative for the Control and Surveillance of Cystic Echinococcosis. In order to optimize the epidemiological reports on hydatidosis, we present three clinical cases seen in national centers and we carry out a review of the local literature on the topic. From 1969 to date, 70cases of cystic echinococcosis have been described. Systematic epidemiological studies are required to assess the degree of penetration, geographic distribution, and transmission characteristics of this disease in our country.Key words:echinococcosis;echinococcosispulmonar;echinococcosishepatic;echinococcus granulosus; zoonoses.

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Cystic echinococcosis (CE) in children is a public health problem. To describe the clinical and epidemiological profile of CE, we reviewed the records of 55 children admitted to our institution with a confirmed diagnosis of CE between 2017-2019, analyzing demographic data, clinical manifestations, and treatment. Of the population, 61.8% (34/55) were male. The mean age was 9.25 years (SD: 2.79); 16.4% had previous CE diagnosis, and 50.9% had contact with dogs. The median time of illness was 2 months. Of the patients, 65.5% had hepatic involvement, 56.4% had pulmonary involvement, and 21.8% had both hepatic and pulmonary involvement. The most frequent symptoms were abdominal pain (80.6%) and cough (80.6%). Surgical treatment was performed in 87.5% of patients with hepatic CE, in 100% of those with pulmonary CE and in 100% of those with hepatic and pulmonary CE. Albendazole was prescribed in 100% of hepatic cases, in 73.7% of pulmonary cases, and in 75% of those with both conditions. Mortality was not reported.

La equinococosis quística (EQ) en niños es un problema de salud pública. Para describir las características clínicas y epidemiológicas de la EQ se revisaron los registros de 55 niños con diagnóstico confirmado de EQ admitidos entre 2017 y 2019 en un centro quirúrgico referencial del Perú. Se analizaron los datos demográficos, las manifestaciones clínicas y el tratamiento. El 61,8% (34/55) de los niños fue de sexo masculino. La edad promedio fue de 9,25 años (DE: 2,79); un 16,4% tuvo diagnóstico previo de EQ, y un 50,9% tuvo contacto con perros. La mediana de tiempo de enfermedad fue de dos meses. El 65,5% tuvo afectación hepática, el 56,4% pulmonar y el 21,8% hepática y pulmonar. Los síntomas más frecuentes fueron dolor abdominal (80,6%) y tos (80,6%). El tratamiento quirúrgico se realizó en el 87,5% de los casos con EQ hepática y en el 100% de los casos con EQ pulmonar y EQ hepática y pulmonar. Se prescribió albendazol en el 100% de casos hepáticos, en el 73,7% de casos pulmonares y en el 75% de ambas afectaciones. No se reporta mortalidad.

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Hydatid disease is a zoonotic parasitic disease, most commonly affecting the liver, lungs and nervous system. Portal vein involvement by hydatid cyst disease is very rare with only few cases published to our knowledge. We describe a case involving a 53-year-old woman with portal vein invasion, cavernous transformation and portal biliopathy.

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