Unraveling the clinicopathological and molecular changes induced by neoadjuvant chemotherapy and endocrine therapy in hormone receptor-positive/HER2-low and HER2-0 breast cancer.

BACKGROUND: The characterization and comparison of gene expression and intrinsic subtype (IS) changes induced by neoadjuvant chemotherapy (NACT) and endocrine therapy in hormone receptor-positive (HR+)/human epidermal growth factor receptor 2 (HER2)-low versus HR+/HER2-0 breast cancer (BC) has not been conducted so far. Most evidence on the association of HER2 status with pathologic responses and prognosis in HR+/HER2-negative BC is controversial and restricted to NACT-treated disease. Similarly, a temporal heterogeneity in HER2 status has been described only with NACT. METHODS: We retrospectively recruited a consecutive cohort of 186 patients with stage I-IIIB HR+/HER2-negative BC treated with neoadjuvant therapy (NAT). Available diagnostic biopsies and surgical samples were characterized for main pathological features, PAM50 IS and ROR-P score, and gene expression. Associations with pathologic complete response, residual cancer burden-0/I, event-free survival (EFS) and overall survival (OS) based on HER2 status were assessed. Pre/post pathologic/molecular changes were analyzed in matched samples. RESULTS: The HER2-low (62.9%) and HER2-0 (37.1%) cohorts did not differ significantly in main baseline features, treatments administered, breast-conserving surgery, pathologic complete response and residual cancer burden-0/I rates, EFS, and OS. NAT induced, regardless of HER2 status, a significant reduction of estrogen receptor/progesterone receptor and Ki67 levels, a down-regulation of PAM50 proliferation- and luminal-related genes/signatures, an up-regulation of selected immune genes, and a shift towards less aggressive IS and lower ROR-P. Moreover, 25% of HER2-0 changed to HER2-low and 34% HER2-low became HER2-0. HER2 shifts were significant after NACT (P < 0.001), not neoadjuvant endocrine therapy (P = 0.063), with consistent ERBB2 mRNA level dynamics. HER2 changes were not associated with EFS/OS. CONCLUSIONS: HER2-low and HER2-0 status change after NAT in ∼30% of cases, mostly after NACT. Targeted adjuvant strategies should be investigated accordingly. Molecular downstaging with current chemo/endocrine agents and immunotherapy should not rely on HER2 immunohistochemical levels in HR+/HER2-negative BC. Instead, HER2-low-targeted approaches should be explored to pursue more effective and/or less toxic dimensional downstaging.

Antibiotic therapy in dogs and cats in general practice in the United Kingdom before referral.

OBJECTIVES: To describe antibiotic prescription by veterinarians in general practices in the United Kingdom before referral and analyse if UK antibiotic stewardship guidelines were followed. MATERIALS AND METHODS: The clinical records from dogs and cats referred to the Internal Medicine and Oncology departments of two referral hospitals were retrospectively reviewed. RESULTS: There were 917 cases included, of which 486 (53.0%) had been prescribed antibiotics for the presentation they were subsequently referred for. Bacterial culture or cytology to guide antibiotic prescription had been performed in 43 of 486 (8.8%) and nine of 486 cases (1.8%) respectively. In four cases, both cytology and culture were performed. For those animals who had received antibiotics, 344 of 486 (70.8%) prescriptions did not comply with UK antibiotic stewardship guidelines. Following investigations at a referral centre, a bacterial aetiology was found or suspected in 17.9% of the cases that received antibiotics. CLINICAL SIGNIFICANCE: Use of diagnostics, including culture and cytology, to prove or determine the likelihood of a bacterial aetiology was infrequently performed before referral and may have contributed to overprescription of antibiotics. Encouraging veterinarians to undertake appropriate diagnostics, in combination with education around compliance with antibiotic stewardship guidelines, might reduce antibiotic prescription.

Prognostic value of intrinsic subtypes in hormone-receptor-positive metastatic breast cancer: systematic review and meta-analysis.

BACKGROUND: In hormone receptor-positive (HoR+) breast cancer (BC), gene expression analysis identifies luminal A (LumA), luminal B (LumB), human epidermal growth factor receptor 2 (HER2)-enriched (HER2-E), basal-like (BL) intrinsic subtypes and a normal-like group. This classification has an established prognostic value in early-stage HoR+ BC. Here, we carried out a trial-level meta-analysis to determine the prognostic ability of subtypes in metastatic BC (MBC). MATERIALS AND METHODS: We systematically reviewed all the available prospective phase II/III trials in HoR+ MBC where subtype was assessed. The primary endpoint was progression-free survival (PFS)/time to progression (TTP) of the LumA subtype compared to non-LumA. Secondary endpoints were PFS/TTP of each individual subtype, according to treatment, menopausal and HER2 status and overall survival (OS). The random-effect model was applied, and heterogeneity assessed through Cochran's Q and I2. Threshold for significance was set at P < 0.05. The study was registered in PROSPERO (ID: CRD42021255769). RESULTS: Seven studies were included (2536 patients). Non-LumA represented 55.2% and was associated with worse PFS/TTP than LumA [hazard ratio (HR) 1.77, P < 0.001, I2 = 61%], independently of clinical HER2 status [Psubgroup difference (Psub) = 0.16], systemic treatment (Psub = 0.96) and menopausal status (Psub = 0.12). Non-LumA tumors also showed worse OS (HR 2.00, P < 0.001, I2 = 65%), with significantly different outcomes for LumB (PFS/TTP HR 1.46; OS HR 1.41), HER2-E (PFS/TTP HR 2.39; OS HR 2.08) and BL (PFS/TTP HR 2.67; OS HR 3.26), separately (PFS/TTP Psub = 0.01; OS Psub = 0.005). Sensitivity analyses supported the main result. No publication bias was observed. CONCLUSIONS: In HoR+ MBC, non-LumA disease is associated with poorer PFS/TTP and OS than LumA, independently of HER2, treatment and menopausal status. Future trials in HoR+ MBC should consider this clinically relevant biological classification.

Malformaciones arteriovenosas pulmonares: presentación de un caso clínico pediátrico y revisión de la literatura / Pulmonary arteriovenous malformations: presentation of a pediatric case and review of the literature

Las malformaciones arteriovenosas pulmonares (MAVP) consisten en comunicaciones directas entre el sistema arterial y el sistema venoso pulmonar, sin paso de la sangre por el lecho capilar, produciéndose un cortocircuito de derecha a izquierda extracardíaco, pueden ser congénitas o adquiridas. Algunos casos pueden ser asintomáticos, en cambio en otros pueden ocasionar diversas manifestaciones clínicas y se pueden asociar a complicaciones severas. En niños se observa una baja incidencia y son más frecuentes las formas congénitas. La MAVP se debe sospechar por las manifestaciones clínicas y las imágenes de la radiografía de tórax (RxTx) y su confirmación se realiza mediante una AngioTomografía Computada (TC) de tórax. La embolización endovascular es actualmente el tratamiento de elección, con excelentes resultados, aunque requiere de un seguimiento posterior y de un operador experimentado. Reportamos el caso de una niña que ingresó con clínica muy sugerente, incluyendo: disnea, acropaquia, cianosis periférica, e hipoxemia refractaria. Sin embargo, inicialmente el cuadro clínico fue confundido con una crisis asmática. La Angio-TC de tórax confirmó el diagnóstico y el tratamiento mediante embolización endovascular resultó exitoso.

Pulmonary arteriovenous malformations (PAVM) are communications between the arterial and the pulmonary venous system, without passage of blood through the capillary bed, causing a left to right extracardiac shunt. Some cases may be asymptomatic, while others may cause various clinical manifestations and may be associated with severe complications. In children a low incidence is observed, and congenital forms are more frequent. PAVM should be suspected by clinical manifestations and chest x-ray imaging and confirmed by chest Computed Tomography Angiography (CTA). Endovascular embolization is currently the treatment of choice, with excellent results, although it requires subsequent follow-up. We report a patient who was admitted with a very suggestive clinical history, including: dyspnea, clubbing, peripheral cyanosis, and severe hypoxemia, refractory to oxygen therapy. However, initially the clinical picture was confounded with an asthmatic crisis. CTA confirmed the diagnosis and treatment by endovascular embolization was successful.

The impact of fluorescence angiography on anastomotic leak rate following transanal total mesorectal excision for rectal cancer: a comparative study.

BACKGROUND: Anastomotic leak (AL) is the most feared complication in colorectal surgery. Indocyanine green (ICG) fluorescence angiography allows for real-time intraoperative evaluation of bowel perfusion. This study aimed to assess the impact of ICG on perioperative outcomes in patients treated with transanal total mesorectal excision (TaTME) for rectal cancer. METHODS: Comparative study based on a retrospective analysis of prospectively collected data, to validate the use of ICG assessment (ICGA) during TaTME (November/2011-June/2018). The primary outcome was the clinical AL rate. The secondary outcomes included modification of proximal colonic transection, anastomotic redo, additional surgical maneuvers and surgical morbidity. RESULTS: Two hundred and eighty-four patients were included, 204 (71.8%) in non-ICG group and 80 (28.2%) in ICG group. No significant differences were found in patient and tumor features. Mean anastomotic height was 4.85 cm vs. 5.04 cm (p = 0.500), diverting stoma was constructed in 205 patients (72.1% vs. 72.5%; p = 0.941). Fluorescence angiography modified the surgical plan in 23 patients (28.7%). AL was diagnosed in 23 patients (11.3%) in the non-ICG group and in two patients (2.5%) in the ICG group (p = 0.020). Postoperative intraabdominal collection was diagnosed in 19 patients (7.4% vs. 5.1%; p = 0.490), and reintervention was needed in 24 patients (10.8% vs. 7.6%; p = 0.420). Median length of hospital stay was 6.0 (IQR 5.0-9) vs. 4.0 (IQR 3.0-8.5) (p = 0.005). ICGA was found as independent protective factor for AL in the multivariate analysis of the whole cohort (n = 284) (OR 0.142; 95% CI 0.032-0.633; p = 0.010). CONCLUSION: ICG fluorescence angiography modified the proximal colonic transection in more than one-quarter of patients, leading to a significant decrease of AL rate.

[Mediation in public healthcare: opportunities for improvement]. / Mediación en el sistema público de salud: oportunidades para mejorar.

BACKGROUND: Mediation in healthcare is a non-adversarial process to resolve a dispute risen between patients and health providers during medical attention Aim: To characterize the mediation process taking place in the public health system in Chile, from its start until 2017. MATERIAL AND METHODS: Cross-sectional descriptive study. Under the Transparency Law, information about mediation processes between 2005 and 2017 was requested to the State Defense Council (CDE in its Spanish acronym). This data was complemented with the information available on the website of this agency. RESULTS: Ninety four percent of the complaints filed at the CDE were deemed eligible for mediation. Only 19% of the concluded cases led to an agreement between the disputing parties. The agreements reached were mostly monetary compensation, medical assistance, and apologies/explanation of the facts. The average amount of compensation reached $14,862,088 (Chilean pesos). The most commonly claimed damage resulting from medical care was partial disability. The medical specialties more often claimed were Obstetrics and Gynecology, General Surgery, and Internal Medicine. CONCLUSIONS: The analysis of conducted mediations is a source of feedback for healthcare staff and health institutions. It would greatly contribute to prevent possible damage and medical conflicts, specially within the specialties with the most complaints. Improvements to the existing legislation are required to ensure free access for all the population.

Three-year outcome after transanal versus laparoscopic total mesorectal excision in locally advanced rectal cancer: a multicenter comparative analysis.

BACKGROUND: For patients with mid and distal rectal cancer, robust evidence on long-term outcome and causal treatment effects of transanal total mesorectal excision (TaTME) is lacking. This multicentre retrospective cohort study aimed to assess whether TaTME reduces locoregional recurrence rate compared to laparoscopic total mesorectal excision (LapTME). METHODS: Consecutive patients with rectal cancer within 12 cm from the anal verge and clinical stage II-III were selected from three institutional databases. Outcome after TaTME (Nov 2011 - Feb 2018) was compared to a historical cohort of patients treated with LapTME (Jan 2000 - Feb 2018) using the inverse probability of treatment weights method. The primary endpoint was three-year locoregional recurrence. RESULTS: A total of 710 patients were analysed, 344 in the TaTME group and 366 in the LapTME group. At 3 years, cumulative locoregional recurrence rates were 3.6% (95% CI, 1.1-6.1) in the TaTME group and 9.6% (95% CI, 6.5-12.7) in the LapTME group (HR = 0.4; 95% CI, 0.23-0.69; p = 0.001). Three-year cumulative disease-free survival rates were 74.3% (95% CI, 68.8-79.8) and 68.6% (95% CI, 63.7-73.5) (HR = 0.82; 95% CI, 0.65-1.02; p = 0.078) and three-year overall survival 87.2% (95% CI, 82.7-91.7) and 82.2% (95% CI, 78.0-86.2) (HR = 0.74; 95% CI, 0.53-1.03; p = 0.077), respectively. In patients who underwent sphincter preservation procedures, TaTME was associated with a significantly better disease-free survival (HR = 0.78; 95% CI, 0.62-0.98; p = 0.033). CONCLUSIONS: These findings suggest that TaTME may improve locoregional recurrence and disease-free survival rates among patients with mid and distal locally advanced rectal cancer.

Mediación en el sistema público de salud: oportunidades para mejorar / Mediation in public healthcare: opportunities for improvement

Background: Mediation in healthcare is a non-adversarial process to resolve a dispute risen between patients and health providers during medical attention Aim: To characterize the mediation process taking place in the public health system in Chile, from its start until 2017. Material and Methods: Cross-sectional descriptive study. Under the Transparency Law, information about mediation processes between 2005 and 2017 was requested to the State Defense Council (CDE in its Spanish acronym). This data was complemented with the information available on the website of this agency. Results: Ninety four percent of the complaints filed at the CDE were deemed eligible for mediation. Only 19% of the concluded cases led to an agreement between the disputing parties. The agreements reached were mostly monetary compensation, medical assistance, and apologies/explanation of the facts. The average amount of compensation reached $14,862,088 (Chilean pesos). The most commonly claimed damage resulting from medical care was partial disability. The medical specialties more often claimed were Obstetrics and Gynecology, General Surgery, and Internal Medicine. Conclusions: The analysis of conducted mediations is a source of feedback for healthcare staff and health institutions. It would greatly contribute to prevent possible damage and medical conflicts, specially within the specialties with the most complaints. Improvements to the existing legislation are required to ensure free access for all the population.

5G-assisted telementored surgery.

Safe and effective implementation of remote surgery and telementoring can have significant limitations. Fifth-generation (5G) wireless networks could be useful in overcoming these drawbacks. As a proof of concept, the authors present technical and clinical details of two procedures assisted by telementoring using 5G that were also broadcast live. Secure remote access advice.

Elaboración del Informe Médico Legal de Lesiones Odontológico: Recomendaciones para el Odontólogo / Elaboration of the Dental Legal Report of Dental Injuries: Recommendations for the Dentist

RESUMEN: El odontólogo juega un papel relevante en la acreditación o constatación de lesiones, especialmente si cumple labores en servicios de urgencia. Esta primera evaluación es fundamental para que el perito en lesionología forense del Servicio Médico Legal (SML) se pronuncie posteriormente respecto del pronóstico médico legal de las lesiones, señalando el tiempo que demorarán en sanar o la incapacidad laboral que generan, además de vincularlas causalmente con los hechos delictivos investigados. Se presenta información actualizada sobre el proceso de constatación de lesiones, el informe de lesiones en la legislación chilena y la participación que le cabe al cirujano dentista. La preparación de un correcto informe médicolegal de lesiones es un acto médico que no se puede delegar a otro miembro del personal de salud que no sea el profesional médico tratante. Todo cirujano dentista debe tener la capacidad de generar un primer informe de lesiones apropiado a las exigencias legales y éticas que la sociedad exige. La ley expresa la posibilidad de citar a un juicio oral, en calidad de testigo, al profesional que haya confeccionado un informe médicolegal de lesiones (constatación de lesiones), con el propósito de dar testimonio de manera directa, explicando desde un punto de vista profesional lo registrado.

ABSTRACT: The general dentist plays a major role in ascertaining and verifying injuries, especially if he or she, works in an emergency department. The initial evaluation is fundamental for the forensic dentist in order to subsequently state a prognosis of the injuries sustained, indicating how long they will take to heal, and the disability related to time away from employment. Further, it is the forensic dentist´s responsibility to evaluate and relate cause of injuries with the criminal offenses being investigated. In this study, updated information about the process is presented of medical injury verification, the injuries report in the Chilean legislation, and the participation of the dentist. The correct preparation of a forensic report of injuries is a medical responsibility that cannot be delegated to another member of the healthcare staff. All dentists must have the ability to generate a first report of injuries, according to society's legal and ethical requirements. The law states that the professional who completes a forensic report of injuries, can be summoned to trial as a witness, with the purpose of providing direct testimony, and objectively explain what he/she observed in that specific case.

Responsabilidad Médica en Chile: Fallos de la Corte Suprema de Justicia 2017 / Medical Malpractice in Chile: Rulings of the Supreme Court of Justice 2017

RESUMEN: El objetivo de este trabajo fue analizar los datos epidemiológicos y jurídicos de los casos por responsabilidad médica fallados por la Corte Suprema de Justicia chilena (CSJ) el año 2017, para relevar los escenarios de alto riesgo, aportando a su prevención. Se realizó un estudio retrospectivo, revisando los fallos de la CSJ en la base de datos electrónica del Poder Judicial chileno. Se seleccionaron y analizaron los fallos por responsabilidad médica. Se detectó un total de 61 casos por responsabilidad médica que alcanzaron la CSJ en 2017. Todos correspondieron a causas civiles. La duración promedio de los juicios fue 41,9 meses. La especialidad más demandada y condenada fue ginecología. La mayoría de las demandas y condenas afectó al Sistema Público de salud. Los casos que dan origen a las demandas son, en su mayoría, de atención de urgencias por sobre las programadas, y de tratamiento por sobre procedimientos quirúrgicos. El 54,8 % de los casos resultaron en la muerte del paciente. La mitad de los fallos condenatorios involucraba el fallecimiento del usuario afectado. Se deben investigar los factores de riesgo no sólo de la ocurrencia de mal-praxis, si no de la judicialización de los conflictos médico-paciente, especialmente en el área gineco-obstétrica, incluyendo los casos de instancias anteriores a la CSJ. Se debe investigar así mismo los factores de riesgo para la mayor propensión de los profesionales de sexo masculino de ser demandados y condenados por malpraxis médica.

ABSTRACT: The objective of the present study is to characterize the epidemiologic and juridical data for medical malpractice cases ruled by the Chilean Supreme Court (CSC) in 2017, to highlight the high risk scenarios, as a contribution to their prevention. A search of the CSC electronic database was conducted to identify and analyze CSC rulings for medical malpractice cases. In this study 61 malpractice cases ruled by CSC were identified. The CSC received only civil cases of medical malpractices during the studied period. The average duration of the trial was 41.9 months. Gynecologists faced suits and received sentences more frequently than any other type of specialist. The majority of prosecuted cases and convictions were associated with the public health system. A greater number of claims were related to emergency care than with scheduled procedures. Likewise, more claims were associated with non-surgical treatment than with surgical procedures. 54.8 % of all cases resulted in the patient's death. Half of the cases that lead to conviction, were related to the death of a patient. Risk factors should be investigated, not only of the occurrence of malpractice, but also of the judicial process of doctor-patient conflicts, especially in the obstetrics and gynecology area, including the analysis of cases of prior judicial instances. The risk factors for the higher propensity of male professionals to be prosecuted and convicted for medical malpractice should also be investigated.

Author Correction: Combination of KIR2DS4 and FcγRIIa polymorphisms predicts the response to cetuximab in KRAS mutant metastatic colorectal cancer.

A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has been fixed in the paper.

Combination of KIR2DS4 and FcγRIIa polymorphisms predicts the response to cetuximab in KRAS mutant metastatic colorectal cancer.

Cetuximab is a standard-of-care treatment for RAS wild-type metastatic colorectal cancer (mCRC) but not for those harbor a KRAS mutation since MAPK pathway is constitutively activated. Nevertheless, cetuximab also exerts its effect by its immunomodulatory activity despite the presence of RAS mutation. The aim of this study was to determine the impact of polymorphism FcγRIIIa V158F and killer immunoglobulin-like receptor (KIR) genes on the outcome of mCRC patients with KRAS mutations treated with cetuximab. This multicenter Phase II clinical trial included 70 mCRC patients with KRAS mutated. We found KIR2DS4 gene was significantly associated with OS (HR 2.27; 95% CI, 1.08-4.77; P = 0.03). In non-functional receptor homozygotes the median OS was 2.6 months longer than in carriers of one copy of full receptor. Multivariate analysis confirmed KIR2DS4 as a favorable prognostic marker for OS (HR 6.71) in mCRC patients with KRAS mutation treated with cetuximab. These data support the potential therapeutic of cetuximab in KRAS mutated mCRC carrying non-functional receptor KIR2DS4 since these patients significantly prolong their OS even after heavily treatment. KIR2DS4 typing could be used as predictive marker for identifying RAS mutated patients that could benefit from combination approaches of anti-EGFR monoclonal antibodies and other immunotherapies to overcome the resistance mediated by mutation in RAS.

Docencia e Investigación en Odontología Legal en Chile: Situación y Desafíos Actuales / Teaching and Research in Legal Dentistry in Chile: Current Situation and Challenges

RESUMEN: El objetivo de este estudio es describir las características de las instituciones y el equipo de investigación y docencia que imparten Odontología Legal (OL) a nivel pregrado en Chile. Estudio cualitativo realizado durante el 2017. Desde las páginas web institucionales de las universidades que imparten la carrera de odontología en Chile, se obtuvo información sobre el cuerpo docente del ramo de OL a nivel pregrado. Cuando la información no estuvo disponible, se solicitó vía correo electrónico. Se realizó una búsqueda de publicaciones chilenas sobre OL y Forense en las bases de datos Medline, SciELO, Lilacs y Cochrane, y se identificó aquellas realizadas por docentes ejerciendo en Chile. La asignatura de OL se imparte a nivel pregrado en 17 de las 21 universidades que imparten la carrera de Odontología, siendo un curso obligatorio en 16 de ellas, y electivo en una de ellas. De los 29 docentes que imparten el ramo a nivel pregrado en Chile, sólo tres tiene la especialidad de OL. Se encontraron sólo 28 publicaciones científicas en el área en los últimos diez años, cuya autoría corresponde a cinco de los docentes del ramo a nivel pregrado. En Chile, la docencia de OL, a nivel pregrado, es impartida mayoritariamente por cirujano-dentistas no especializados en el área, en concordancia con que la especialidad comenzó a impartirse en el año 2015. Es imperioso aumentar la investigación en OL entre los docentes, de manera de desarrollar el área a nivel universitario, aumentando el conocimiento en la disciplina y consolidándola como ciencia.

ABSTRACT: The aim of this study was to describe the characteristics of the universities and the research and education teams imparting "Forensic Odontology" at undergraduate level in Chile. A qualitative cross-sectional study was conducted during 2017. Information was sought from the institutional websites of universities that impart Dentistry degrees. When the information was not available, it was requested via email to the respective authorities. A search was conducted to identify Chilean publications that deal with the topic of forensic dentistry, in the Medline, SciELO, Lilacs and Cochrane databases. Those authored or co-authored by academic(s) teaching in Chile were identified. "Forensic Odontology" is taught at undergraduate level in 17 of the 21 universities that impart the career of Dentistry in Chile, being mandatory in 16 of schools, and an elective in one of them. Of the 29 academics who teach the subject at undergraduate level in Chile, only three have the specialty of OL. Only 28 scientific publications in the area were found in the last ten years, whose authorships correspond to five academics in the field, teaching at undergraduate level. In Chile, "Forensic Odontology" at the undergraduate level, is mainly imparted by dental surgeons not specialized in the subject, in accordance with the fact that the specialty began to be taught in Chile only in 2015. It is imperative to increase the amount of research in forensic odontology conducted by the academics, in order to develop the area at the university level, to improve knowledge in this discipline and consolidate it as a science.

Nuevo Código de Ética Profesional Odontológica en Chile II: Relación entre Colegas, Asociación Profesional y Responsabilidad Social / New Code of Professional Ethics for Dentist in Chile II: Relationship with Colleagues, Professional Association and Social Responsibility

RESUMEN: El objetivo de este estudio es analizar el Código de Ética propuesto recientemente por el Colegio de Cirujano Dentistas de Chile a la luz de la revisión de otros códigos profesionales odontológicos vigentes en otros países del mundo, discutiendo los temas que son más frecuentemente regulados en ellos, en lo referente a la relación del odontólogo con sus pares y con la sociedad en su conjunto. Se realizó una búsqueda en páginas web de acceso público de los Códigos de Ética Odontológica de Chile, Unión Europea, Estados Unidos, Australia y algunos países latinoamericanos. Se identificó, clasificó, seleccionó y analizó los temas considerados más relevantes: relación laboral con colegas y personal de apoyo, interconsultas, denuncia de mal praxis y ejercicio ilegal, rol como perito, colegiación, publicidad, y liderazgo y rol social. Se encontró que varios temas importantes y controversiales no son tratados en profundidad en los distintos Códigos de Ética Profesional revisados, incluyendo el chileno. El respeto, la colaboración, la responsabilidad y la autorregulación profesional parecen ser las claves para el desarrollo integral y sustentable de nuestra profesión.

ABSTRACT: The objective of this study is to analyze the Code of Ethics recently proposed by the Chilean Dental Association, after studying other professional odontological codes currently in force in different countries of the world, discussing the most commonly regulated topics concerning the relationship between dentist and his peers, and with society as a whole. The Dental Codes of Ethics from Chile, the European Union, the United States, Australia, and some Latin-American countries were searched in websites with open access. The most relevant topics were identified, classified, selected and analyzed: working relationship between colleagues and with support staff, inter-consultation, reporting malpractice, illegal exercise of the profession, role as an expert witness, association, publicity, and leadership and social role. It was found that many important and controversial topics were not discussed in depth in the different examined Codes of Ethics, including the Chilean. Respect, collaboration, responsibility, and self-professional regulation seem to be the key for the integral and sustainable development of our profession.