| Table of contents Cir. cir. vol.89 n.1 Ciudad de México Jan./Feb. 2021 Editorial | | | | · Advanced head and neck treatment. Neoadjuvantly, concomitantly or surgery? Gallegos-Hernández, José F.; Abrego-Vázquez, José A.
| | | Original articles | | | | · Surgical activation protocol COVID-19 (SAP COVID) Juanz-González, Abelardo; Barreras-Espinoza, Jorge A.; Leyva-Moraga, Eduardo; Leyva-Moraga, Francisco A.; Leyva-Moraga, Fernando
| | | | · Litiasic acute cholecystitis: application of Tokyo Guidelines in severity grading Escartín, Alfredo; González, Marta; Muriel, Pablo; Cuello, Elena; Pinillos, Ana; Santamaría, Maite; Salvador, Helena; Olsina, Jorge-Juan
| | | | · Comparación entre los puntajes de graduados médicos mexicanos e internacionales obtenidos en la ENARM que compiten por especialidades quirúrgicas en México durante 2012-2019: visualización de datos, análisis de tendencias y pronósticos Cedillo-Pozos, Aime; Mendoza-Aguilar, Alexela N.; Roldan-Valadez, Ernesto
| | | | · Parameterizing a tumor humeral prosthesis and development of a set Araujo-Monsalvo, Benjamín; Gómez-Procopio, Janeth; Araujo-Monsalvo, Víctor M.; Hernández-Simón, Luis M.; Domínguez-Hernández, Víctor M.; Rico-Martínez, Genaro; Linares-González, Luis M.; Martínez-Coria, Elisa; Nava-Sánchez, José L.
| | | | · Presentation, management and evolution of patients with abdominal gunshot wound. A decade of violence in Mexico Cantú-Alejo, Daniel R.; Reyna-Sepúlveda, Francisco; García-Hernández, Saúl; Sinsel-Ayala, Jessica; Hernández-Guedea, Marco; Pérez Rodríguez, Edelmiro; Muñoz-Maldonado, Gerardo
| | | | · Pulmonary ultrasound in COVID-19: case series Tapia-Salazar, Mauricio; Melgar Bieberach, Rebeca E.; Carrillo-Esper, Raúl; Jacinto-Flores, Sarahi A.; Campa-Mendoza, Ángela N.
| | | | · Correlation of echocardiographic variables and biomarkers in severely ill COVID-19 patients Calderón-Esquivel, Nestor; Vázquez-Flores, A. David; González-Chon, Octavio; García-Briones, Alondra; Gutiérrez-Villaseñor, Alan O.; Romero-González, Juan P.; Juárez-Hernández, Eva; Sosa-García, J. Ojino
| | | | · Parapneumonic effusion and thoracic empyema in adults. Clinical aspects, microbiology and frequency of surgical outcome Báez-Saldaña, Renata; Molina-Corona, Héctor; Martínez-Rendón, María E.; Iñiguez-García, Marco; Escobar-Rojas, Araceli; Fortoul-Vandergoes, Teresa
| | | | · Urachal adenocarcinoma. Analysis of 8 years in a third level medical facility Reyes-Arroyo, Jorge; Mejía-Ríos, Laura C.; Fernández-Vivar, Elieser; Gutiérrez-Quiroz, Claudia T.; Priego-Niño, Alejandro; Montiel-Jarquín, Álvaro J.
| | | | · Association of the moment of administration of intratympanic dexamethasone with the auditory results in patients with sudden idiopathic hearing loss: 101 cases Maldonado-Sánchez, Luis R.; Pineda-Cásarez, Fernando
| | | | · Factores sociodemográficos asociados a cirugía de cáncer colorrectal de urgencia en un centro de referencia en México Vergara-Fernández, Omar; Trejo-Avila, Mario; Santes, Oscar; Solórzano-Vicuña, Danilo; Moctezuma-Velázquez, Paulina; Sainz, Juan C.; Alvarez-Bautista, Francisco; Salgado-Nesme, Noel
| | | | · Endoscopic retrograde cholangiopancreatography for treatment biliopleural fistulas Marcos-Ramírez, Edson R.; Téllez-Aguilera, Alejandra; Ramírez-Morín, Martín A.; Treviño-Martínez, María I.; Vásquez-Fernández, Francisco; Hernández-Guedea, Marco A.; Muñóz-Maldonado, Gerardo
| | | Clinical cases | | | | · Frozen abdomen complicated with midline heterotopic peritoneal ossification: case report Meléndez-Fernández, Ana P.; Villa-Sierra, Ricardo; Góngora-Acosta, Ana G.; Abreu-Rejón, Eugenio J.; Hernández-Cruz, Elías; Torre y Rendón, Fernando E. De la; Tapia-Yáñez, Alejandro U.; Albarrán-Castillo, Raúl E.
| | | | · Hemoperitoneum secondary to haemocholecyst due to acute cholecystitis Sagarra-Cebolla, Elena; Olivares-Pizarro, Sergio P.; Ríos-Blanco, Raquel; San-Pío-Carvajal, Eduardo de; Rodríguez-Prieto, Ignacio
| | | Review articles | | | | · Update in survival hepatocellular carcinoma Montalvo-Javé, Eduardo E.; Hoyos-Lazaro, Ana E.; Espejel-Deloiza, Mariana; Chernitzky-Camaño, Jonathan; Rodríguez-Báez, Alejandro; Ortega-León, Luis H.
| | | | · Thrombotic complications in severe COVID-19: focus on venous thromboembolism, thromboprophylaxis and anticoagulation Porres-Aguilar, Mateo; Guerrero-de León, María Cristina; Grimaldo-Gómez, Flavio A.; Izaguirre-Ávila, Raúl; Cabrera-Rayo, Alfredo; Santos-Martínez, Luis E.; Sánchez-Medina, Jorge R.; Porres-Muñoz, Mateo; Carrillo-Esper, Raúl
| | | | · Expert consensus in times of COVID-19: health applications of the Delphi method Martínez-Ezquerro, José D.; Ruiz-Cejudo, Sonia María; Bustamante-Fuentes, Alejandra; Díaz-Badillo, Álvaro; García-Oropesa, Esperanza M.; López-Sosa, Elena B.; Martínez-López, Yoscelina E.; Moctezuma-Chávez, Óscar O.; Nava-González, Edna J.; Perales-Torres, Adriana L.; Pérez-Navarro, Lucía M.; Rosas-Díaz, Marisol; López-Alvarenga, Juan C.; Grupo Síntevi
| | | Letters to the editor | | | | · Nasogastric tube insertion in COVID-19 patients: should we worry about aerosol production? Cervantes-Pérez, Enrique; Cervantes-Pérez, Lorena A.; González-Ojeda, Alejandro; Reyes-Torres, Carlos A.
| | | | · Protection device during aerosol-generating procedures. Regarding the COVID-19 pandemic Elizondo-Zapién, Rosa María; Palacios-Saucedo, Gerardo del C.
| | | History and philosophy of medicine | | | | · Surgery through time. Saturn extract: an 18th century medical prescription Gómez, Lina A.; Tuta-Quintero, Eduardo; Briceño-Balcázar, Ignacio; García, Angélica; Martínez-Lozano, Julio; Gómez-Gutiérrez, Alberto
| | | Erratum | | | | · Erratum: Photographic documentation during safe laparoscopic cholecystectomy. Update January 2021[Cir Cir. 2018;86(2):152-156]
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