Pathology results of endoscopic ultrasound-guided tissue acquisition in retroperitoneal masses: a multicenter study.

Background: Malignant etiologies are found in 70-80% of symptomatic retroperitoneal masses. Histology is required for diagnosis and treatment. Information about endoscopic ultrasound (EUS)-guided tissue acquisition (EUS-GTA) is scant for retroperitoneal masses. This study aimed to assess the pathology results of EUS-GTA for diagnosing retroperitoneal masses. Methods: This retrospective, multicenter study involved patients from 5 care centers. All patients with retroperitoneal masses who underwent EUS evaluation were enrolled. We recorded demographic and clinical characteristics, location and size of the mass, type of needle (FNA/FNB), and complications related to the procedure. Results: A total of 43 patients were included. The median age was 50.5 (range: 23-83) years, and 22 (51.2%) were female. The initial symptom was abdominal pain in 23 (52.3%) cases and weight loss in 11 (25%). Initial imaging was by computed tomography in 33 (75%) patients. Diagnosis with EUS-GTA was reached in 67.5% (29/43) cases. The most frequent histological diagnosis was carcinoma, in 25.5% (11/43). A malignant etiology was found in 31 (72%): 20 were primary tumors from the retroperitoneum, and 11 were metastases. In patients with metastasis, surgery was avoided and medical treatment was indicated. No adverse events were reported. Conclusion: EUS and EUS-GTA can frequently provide accurate tissue diagnosis and significantly impact the subsequent management.

[Solid pseudopapillary tumors of pancreas in Costa Rica: serie of cases and review of literatura]. / Tumores sólidos pseudopapilares del páncreas en Costa Rica: serie de casos y revisión de tema.

INTRODUCTION: Solid pseudopapillary tumors of pancreas are rare primary neoplasm of the pancreas, typically affects women. OBJECTIVES: We have to describe our experience in the management of this kind of tumors in our center. Material and Materials and methods: We reviewed database from the Pathology Service in Hospital Calderon Guardia and Mexico Hospital between January 2013 to April 2018. We found 13 cases of solid pseudopapillary tumors, reviewed their charts and describe their data. RESULTS: We found 13 cases of solid pseudopapillary tumors of pancreas. The majority were women, and their middle age was 32 years old. The majority of cases were incidental findings, and the head of pancreas was the most common affected localization. CONCLUSION: This is the first report from Costa Rica that describe the characteristics of solid pseudopapillary tumors, our results were similar than international series.

Tumores sólidos pseudopapilares del páncreas en Costa Rica: serie de casos y revisión de tema / Solid pseudopapillary tumors of pancreas in Costa Rica: serie of cases and review of literature

Introducción: Los tumores sólidos pseudopapilares de páncreas son neoplasias poco frecuentes, más comunes en mujeres, con comportamiento incierto. Objetivo: La presente revisión tiene como meta la descripción de la experiencia en el manejo de estos tumores en nuestro centro y aportar a la casuística nacional. Materiales y métodos: Se revisó bases de datos del Servicio de Patología del Hospital Calderón Guardia y del Hospital México durante el periodo comprendido entre enero del 2013 a abril del 2018 y se encontró un total de 13 muestras compatibles con tumores sólidos pseudopapilares; se revisaron datos clínicos y epidemiológicos y se utilizó estadística descriptiva para el reporte de los datos encontrados. Resultados: Se encontró 13 casos compatibles con tumores sólidos pseudopapilares. La mayoría correspondía a mujeres con un promedio de edad de 32 años. La mayor cantidad se presentó como hallazgo incidental y la localización en cabeza fue la más frecuente. La mayor parte fue manejada de manera quirúrgica. Conclusión: Este es el primer estudio en Costa Rica que describe las características de los tumores sólidos pseudopapilares del páncreas, en el cual se documentó una similitud en las características de nuestros pacientes a las reportadas en series internacionales.

Introduction: Solid pseudopapillary tumors of pancreas are rare primary neoplasm of the pancreas, typically affects women. Objectives: We have to describe our experience in the management of this kind of tumors in our center. Material and Materials and methods: We reviewed database from the Pathology Service in Hospital Calderon Guardia and Mexico Hospital between January 2013 to April 2018. We found 13 cases of solid pseudopapillary tumors, reviewed their charts and describe their data. Results: We found 13 cases of solid pseudopapillary tumors of pancreas. The majority were women, and their middle age was 32 years old. The majority of cases were incidental findings, and the head of pancreas was the most common affected localization. Conclusion: This is the first report from Costa Rica that describe the characteristics of solid pseudopapillary tumors, our results were similar than international series.

Follow-up of patients with pseudotumoral chronic pancreatitis: outcome and surveillance.

AIM: To follow up patients with pseudotumoral chronic pancreatitis (PCP) to assess their outcome and identify an optimal surveillance interval. METHODS: Data obtained prospectively were analyzed in a retrospective manner. Patients with clinical evidence of chronic pancreatitis (abdominal pain in the epigastrium, steatorrhea, and diabetes mellitus), endoscopic ultrasound (EUS) criteria > 4, and EUS-fine needle aspiration (FNA) were included. A pseudotumor was defined as a non-neoplastic space-occupying lesion, a cause of chronic pancreatitis that may mimic changes typical of pancreatic cancer on CT or endoscopic ultrasound but without histological evidence. A real tumor was defined as a neoplastic space-occupying lesion because of pancreatic cancer confirmed by histology. RESULTS: Thirty-five patients with chronic pancreatitis were included, 26 (74.2%) of whom were men. Nine (25.7%) patients were diagnosed with pseudotumoral chronic pancreatitis and two (2/35; 5.7%) patients with pseudotumoral chronic pancreatitis were diagnosed with pancreatic cancer on follow-up. The time between the diagnosis of pseudotumoral chronic pancreatitis and pancreatic adenocarcinoma was 35 and 30 d in the two patients. Definitive diagnosis of pancreatic adenocarcinoma was made by surgery. In the remaining six patients with pseudotumoral chronic pancreatitis, the median of follow-up was 11 mo (range 1-22 mo) and they showed no evidence of malignancy on surveillance. In the follow-up of patients without pseudotumoral chronic pancreatitis but with chronic pancreatitis, none were diagnosed with pancreatic cancer. According to our data, older patients with chronic pancreatitis are at risk of pseudotumoral chronic pancreatitis. CONCLUSION: According to characteristics of patient, detection of PCP should lead a surveillance program for pancreatic cancer with EUS-FNA in < 1 mo or directly to surgical resection.

Use of a novel covered self-expandable metal stent with an anti-migration system for endoscopic ultrasound-guided drainage of a pseudocyst.

The development of pseudocysts in patients with chronic pancreatitis has been reported in 23%-60% of cases and drainage is indicated when they become symptomatic. Endoscopic ultrasound-guided drainage with the placement of plastic or metallic stents to create a cystogastric anastomosis has been shown to be a reliable and efficacious maneuver. Metallic stent use appears to be a safe and effective alternative that shortens the length of time of the procedure and maintains a greater diameter in the cystogastric communication. However, important migration rates have been reported. The use of new metallic stents that are specially designed to prevent migration represents a promising development in the treatment of these group of patients that appears to be safe and effective for pseudocyst drainage and could importantly reduce migration rates, while at the same time having the advantage of a single step procedure and a larger fistula diameter in the endoscopic cystogastric anastomosis.