Os 143 melhores médicos de TAC dos órgãos torácicos, abdominais e pélvicos do mundo

O Prof. Beni Boursi lidera a oncologia gastrointestinal no Sheba Medical Center. Ele utiliza tomografia computadorizada de tórax, abdômen e pelve para o estadiamento preciso do câncer.

• Treinado em oncologia médica no MD Anderson Cancer Center e na Mayo Clinic
• Concluiu um fellowship em oncologia gastrointestinal na Universidade da Pensilvânia
• Desenvolve modelos preditivos para o diagnóstico precoce de câncer colorretal e de pâncreas
• Publicou pesquisas na Science e em outros periódicos científicos globais de destaque
• Membro da Associação Israelense de Oncologia Clínica e Radioterapia

O Professor Ilhan Mavioglu é especializado em imagem vascular e cirurgia no Optimed International Hospital. Ele traz uma experiência acadêmica de alto nível para tomografias computadorizadas de órgãos torácicos, abdominais e pélvicos.

• Detém o título de Professor – o mais alto grau acadêmico na medicina turca
• Ampla experiência em intervenções cirúrgicas endovasculares para aorta e vasos periféricos
• Treinado no Great Ormond Street Hospital em Londres
• Membro ativo da Sociedade Europeia de Cirurgia Vascular
• Publicou inúmeros artigos científicos sobre saúde vascular e distúrbios aórticos

Dr. med. univ. Negar Fakhrai is a radiology specialist at JUVENIS Medical Center in Vienna. She performs diagnostic ultrasound. She has more than 20 years of experience in university, trauma, and private hospitals. She treats patients in German, English, Farsi, and French.

Education: MD, 2001. Her dissertation quantified coronary artery calcification with electron-beam computed tomography. Training in internal medicine and oncology at the Medical University of Vienna with CECOG (2001–2004). Radiology training at the University Clinic (2005–2013). Radiology specialist exam in 2010.

Career: Lorenz Böhler Trauma Hospital (2013–2021). Private clinics since 2016. Rudolfinerhaus (2021–2022). Independent since 2023, including Wiener Privatklinik. Joined JUVENIS in 03/2024. Strong focus on musculoskeletal imaging.

Awards/research: Investigator Award, University Clinic for Radiodiagnostics, Medical University of Vienna (2010). Publications in the American Journal of Neuroradiology, European Journal of Radiology, and Journal of Neuro-Oncology. Ultrasound: abdomen; vascular (carotids, deep leg veins); breast; thyroid/neck; muscles/joints; soft tissue; testes.

Dr. Shute Ailia DAE is a medical oncologist at Optimed International Çorlu Hospital. Dr. Ailia graduated from Dokuz Eylül University Faculty of Medicine in 2013 and completed an internal medicine residency at Bezmialem Vakıf University Hospital in 2018. A hematology–oncology fellowship at Başkent University Hospital followed in 2023.

From 2018 to 2020, Dr. Ailia served as an internal medicine specialist at Bezmialem Vakıf University Hospital. From 2023 to 2024, Dr. Ailia was an instructor in medical oncology at Başkent University Adana Dr. Turgut Noyan Practice and Research Center.

Clinical focus includes breast, lung, and prostate cancers. It also covers gastrointestinal cancers (colon, stomach, esophagus, pancreas, liver), lymphomas, melanoma, and gynecologic and genitourinary cancers. Languages: English, Turkish, Swahili.

Assoc. Prof. Priv.-Doz. Dr. Alexander W. Hauswirth is a specialist in internal medicine and haemato‑oncology at JUVENIS. Since 2010, he has served as the lead senior physician for Haematology/Haemostaseology and Oncology at the Clinic for Internal Medicine I, Medical University of Vienna/AKH Vienna, Austria’s largest hospital.

He earned his medical degree from the University of Vienna in 1999. He received the venia docendi in 2010 and was appointed Associate Professor in 2012. He completed an additional haemato‑oncology qualification in 2014. As a Schrödinger Fellow in Salamanca in 2009–2010, he researched CLL stem and precursor cells. He has published regularly since 2000.

Accreditations include Austrian Medical Chamber diplomas in emergency medicine (since 2009) and sports medicine (2018). Awards include the Schrödinger Fellowship (2009), the ÖGHO award (2009), and the European Society of Chemotherapy poster award (2003). Clinical focus: anaemias, leukaemias, lymph node disorders, clotting and anticoagulation, and pre‑operative clearance. Languages: German and English.

O Dr. Choi Han Yong lidera o Departamento de Urologia no Samsung Medical Center. Ele é especializado em cirurgia oncológica para casos complexos.

• Chefia o Departamento de Urologia em um dos centros médicos de elite da Coreia do Sul
• Especializado em oncocirurgia para cânceres de órgãos pélvicos e abdominais
• Especialista na interpretação de exames de diagnóstico para planejar intervenções cirúrgicas precisas
• Supervisiona protocolos clínicos para o tratamento de câncer urológico no Samsung Medical Center

Zhang Jinshan, male, China’s First M.D. in the Radiation Medicine, CCI (Chinese College of Interventionalists) Master Interventionalist, Director of the Department of Former Radiological Diagnosis at Chinese PLA General Hospital(No.3 in China) Ph.D. of Medicine, Nagasaki University, Japan.

1980–1985: Completed doctoral studies at Nagasaki University, Japan

1968–present: Department of Radiology, Chinese PLA General Hospital

1988: Third Prize of the Military Science and Technology Progress Award

1989–present: Member of Radiological Society of North America(RSNA)

1990–2009: Standing Committee Member of the Radiology and Therapeutic Radiology Committee of the PLA

1991: Second Prize of the Military Science and Technology Progress Award

1992–2008: Group Leader of the Group of Intervention of Chinese Journal of Radiology

1992–2015: Standing Editorial Board Member and Editorial Board Member of Journal of Interventional Radiology

1993: Granted the Lifetime Special Government Allowance of the State Council

1993–2012: Deputy Chief Editor of Chinese Journal of Medical Image Technology

1994: Third Prize of the Military Science and Technology Progress Award

1997: Second Prize of the Military Science and Technology Progress Award

1997–2009: Standing Member of Chinese Society of Radiology

1999: Third Prize of the Military Science and Technology Progress Award

1999–2010: Deputy Director Member of Chinese Society of Interventional Oncology

2002: Second Prize of the Military Science and Technology Progress Award

2005: Third Prize of the Military Science and Technology Progress Award

Member of Radiological Society of North America(RSNA)

Standing Member of Chinese Society of Radiology

Group Leader of the Group of Intervention of Chinese Journal of Radiology

Deputy Director Member of Chinese Society of Interventional Oncology

Director Member of Beijing Medical Association Society of Interventional Radiology

Deputy Chief Editor of Chinese Journal of Medical Image Technology

Standing Member of Professional Committee of Radiological Medicine of the Chinese People’s Liberation Army

Standing Editorial Board Member and Editorial Board Member of Journal of Interventional Radiology

Awarded the Special Government Allowance of the State Council

Awarded three Second Prizes and four Third Prizes for Military Science and Technology Progress.

Awarded the honorary title of “Chinese College of Interventionalists(CCI) Master Interventionalist”

Led multiple national and provincial/ministerial scientific research projects, including two projects funded by the National Natural Science Foundation of China and two projects funded by the Department of Science and Technology of Sichuan Province.

In the pioneering development of interventional medicine in China, Zhang Jinshan has been an indispensable founder and leading figure. As China’s first overseas-trained doctoral graduate in radiological medicine, he returned to China in the 1980s after completing his studies abroad and introduced cutting-edge international interventional technologies to the country. Over more than four decades of dedicated practice and research, he has helped propel Chinese interventional medicine from its infancy to a position at the forefront of the global field through his exceptional clinical expertise and profound academic accomplishments.

Professor Zhang Jinshan has long been dedicated to the field of medical imaging and has developed distinctive expertise in selective and superselective interventional diagnosis and treatment for solid tumors such as liver cancer, demonstrating exceptional technical proficiency and profound academic accomplishment. Beginning in the 1990s, he led his team in pioneering the clinical application and research of TIPSS and B-ORTO in China, filling major gaps in the domestic field and opening new paths for the interventional management of gastrointestinal bleeding caused by portal hypertension secondary to liver cirrhosis. In addition, he has made groundbreaking contributions to the interventional diagnosis and treatment of peripheral vascular diseases, as well as to preoperative embolization for spinal tumors.

In the field of liver cancer treatment, Professor Zhang Jinshan not only led the development of standardized treatment protocols for liver cancer but also pioneered Transcatheter Arterial Chemoembolization with temporary Hepatic Vein Thrombosis (TACE-THVO) for primary liver cancer, bringing the efficacy of interventional therapy to a new level. In recognition of his outstanding clinical and scientific contributions, he was awarded the honorary title of “Chinese Master of Interventional Radiology” at the 2019 annual conference of the Chinese College of Interventionalists.

Professor Zhang Jinshan is not only a master clinician but also a driving force in the development of the discipline and a dedicated mentor in talent cultivation. He led his team in establishing one of China’s premier interventional therapy centers. As a doctoral supervisor, he has trained a large number of outstanding specialists and future leaders in interventional medicine, with many of his students and protégés now serving across the country. Academically, he has led multiple key national and military research projects, published more than 300 academic papers, and served as chief editor of three monographs, making remarkable contributions to the establishment of China’s academic framework for interventional medicine and the nationwide dissemination of its technologies.

From the laboratory to the operating room, and from academic podiums to grassroots hospitals, Professor Zhang Jinshan has consistently upheld the principles of “pioneering, innovation, pragmatism, and compassion". He has devoted his life to fulfilling the mission of a physician—relieving patients’ suffering through minimally invasive techniques and advancing the discipline through academic excellence—thereby establishing himself as a truly towering figure and one of the foremost authorities in the field of interventional medicine in China.

Professor Zhang Jinshan’s Academic Achievements

Professor Zhang Jinshan has achieved prolific academic accomplishments, having published over 300 academic papers covering areas such as interventional therapy for liver cancer, minimally invasive treatment of portal hypertension, interventional treatment of vascular diseases, and tumor ablation.

Selected Publications by Professor Zhang Jinshan

1. Zhang Jinshan, Wang Maoqiang. Experiments and Clinical Studies of transjugular intrahepatic portosystemic stent shunt (TIPSS). Chinese Journal of Radiology, 1993，27（6）：361-365.

Professor Zhang Jinshan is the first author. This is one of the early research papers in China that systematically elaborates on the TIPSS technique. Through animal experiments and clinical case analysis, it confirmed that TIPSS is a safe and effective minimally invasive method for treating portal hypertension and its complications, laying an important foundation for the promotion and application of this technique in China.

2.Zhang Jinshan, Li Huai. Clinical study on transcatheter arterial embolization with temporary hepatic vein occlusion for the treatment of primary liver cancer.Chinese Journal of Radiology, 1996，30（8）：521-524.

Professor Zhang Jinshan is the first author. He innovatively proposed the technique of "transcatheter arterial embolization with temporary hepatic vein occlusion." Clinical results demonstrated that this method can significantly increase the drug concentration within liver cancer lesions, reduce damage to normal liver tissue, and effectively improve the therapeutic outcomes for intermediate and advanced liver cancer, providing a novel strategy for the interventional treatment of liver cancer.

3. Zhang Jinshan, Wang Maoqiang, Li Huai. Interventional treatment of Budd-Chiari syndrome. Chinese Journal of Medical Imaging Technology, 1998，14（3）：189-191.

Professor Zhang Jinshan is the first author. This paper systematically summarizes the early experience in interventional treatment of Budd-Chiari syndrome in China, elaborating in detail on the key operational points and therapeutic efficacy of techniques such as percutaneous transluminal angioplasty and stent placement. It confirms that interventional therapy is the preferred minimally invasive method for Budd-Chiari syndrome, promoting the standardized development of treatment for this disease.

4.Zhang Jinshan, Li Huai, Wang Maoqiang. Clinical value of superselective hepatic arterial chemoembolization in the treatment of hypovascular liver cancer. Chinese Journal of Radiology, 2000，34（5）：335-337.

Professor Zhang Jinshan is the first author. Addressing the challenges in interventional treatment of hypovascular liver cancer, this paper explores the clinical efficacy of superselective hepatic arterial chemoembolization. The results indicate that this technique can precisely target the lesions and improve the treatment response rate, providing an important clinical basis for the interventional treatment of hypovascular liver cancer.

5. Zhang Jinshan, Li Huai, Wang Maoqiang. Interventional treatment of peripheral vascular stenosis and occlusion.Chinese Journal of Radiology, 2002，36（7）：612-614.

Professor Zhang Jinshan is the first author. This paper summarizes the interventional treatment experience of over 400 patients with peripheral vascular stenosis and occlusion, analyzing the indications and efficacy of techniques such as balloon angioplasty and stent placement. It confirms that interventional therapy is a safe and effective approach for peripheral vascular diseases, providing practical support for its clinical promotion.

6.Zhang Jinshan, Li Huai, Wang Maoqiang. Clinical application of CT-guided percutaneous puncture ablation in the treatment of abdominal tumors. Chinese Journal of Medical Imaging Technology, 2004，20（9）：1395-1397.

Professor Zhang Jinshan is the first author. This paper explores the application value of CT-guided percutaneous puncture techniques such as radiofrequency ablation and chemical ablation in the treatment of abdominal tumors. The clinical results show that this method is minimally invasive with reliable efficacy, offering a minimally invasive treatment option for patients with inoperable abdominal tumors.

7.Zhang Jinshan, Wang Maoqiang, Li Huai. Advances in the application of interventional therapy for benign prostatic hyperplasia. Chinese Journal of Radiology, 2006，40（8）：876-878.

Professor Zhang Jinshan is the corresponding author. This paper systematically reviews the cutting-edge advances in interventional therapy for benign prostatic hyperplasia, including the principles, procedures, and efficacy of techniques such as prostatic artery embolization and stent placement, providing new insights for the minimally invasive treatment of benign prostatic hyperplasia.

8.Zhang Jinshan, Li Huai, Wang Maoqiang. Discussion on the standardization of interventional therapy for liver cancer. Chinese Journal of Practical Surgery, 2008，28（10）：856-858.

Professor Zhang Jinshan is the corresponding author. Drawing on years of clinical experience and research findings, he led the discussion on standardized protocols for interventional therapy of liver cancer, covering key aspects such as preoperative assessment, treatment modality selection, and postoperative management, providing important references for the formulation of clinical guidelines for interventional therapy of liver cancer in China.

Professor Zhang Jinshan co-authored monographs

1. Interventional Radiology (People's Military Medical Press, 1995): The first monograph in China to systematically discuss the theories and techniques of interventional radiology. It comprehensively elaborates on the interventional diagnosis and treatment system for tumors, vascular diseases, and non-vascular diseases, becoming a classic essential textbook for interventional physicians in China.

2.Interventional Therapy for Liver Cancer (People's Health Press, 2001): Focusing on minimally invasive interventions for liver cancer, this book systematically summarizes techniques such as TACE, ablation, and vascular intervention, refines operational standards and the prevention and management of complications, and promotes the standardization of interventional therapy for liver cancer.

3.Interventional Treatment of Portal Hypertension (Science Press, 2005): This book systematically elaborates on minimally invasive techniques for portal hypertension, such as TIPSS and B-ORTO, covering experimental research, clinical procedures, long-term follow-up, and efficacy evaluation, filling the gap in monographs on interventional treatment of portal hypertension in China.

Professor Zhang Jinshan’s Research project

1.The National "Eighth Five-Year Plan" Scientific and Technological Key Project—Clinical and Basic Research on Comprehensive Interventional Therapy for Liver Cancer (Project Leader): This project systematically explored multimodal interventional strategies for liver cancer, established the core regimen of superselective TACE combined with local ablation, and significantly improved the therapeutic outcomes for intermediate and advanced liver cancer.

2.The Military "Ninth Five-Year Plan" Key Medical Scientific Research Project—Standardized Research on TIPSS for the Treatment of Portal Hypertension (Project Leader): This project formulated China's first operational standards and postoperative management guidelines for TIPSS, reduced the incidence of complications, and promoted the popularization of this technique throughout the military and across the country.

3.National Natural Science Foundation of China Project — Research on the Mechanism of Targeted Therapy for Liver Cancer Using Hepatic Vein Occlusion Combined with Chemoembolization (Project Leader): This project revealed the synergistic enhancement mechanisms of the innovative technique at the levels of hemodynamics, drug metabolism, and the tumor microenvironment, providing theoretical support for precision interventional therapy of liver cancer.

4.Military Clinical High-Tech Major Project-Establishment and Clinical Application of the Interventional Treatment Technology System for Complex Vascular Diseases (Project Leader): This project overcame interventional challenges in complex lesions such as Budd-Chiari syndrome, peripheral vascular occlusion, and vascular malformations, forming a complete technical system that has been promoted and applied widely.

O Dr. Yaacov Lawrence é o Chefe de Oncologia Radioterápica no Centro Médico Sheba. Ele é especializado em radioterapia de precisão e neuro-oncologia. O Dr. Lawrence foi pioneiro na radiocirurgia do plexo celíaco para o controle da dor no câncer de pâncreas. Ele possui a designação FASTRO, uma das mais altas honrarias em sua especialidade.

• Lidera o Programa de Câncer Gastrointestinal no Centro Médico Sheba.
• Realiza radiocirurgia estereotática para tumores cerebrais e cânceres do sistema nervoso.
• Autor de mais de 280 publicações científicas sobre protocolos de radiação personalizados.
• Concluiu o treinamento de fellowship em oncologia radioterápica na Universidade Thomas Jefferson.

A Prof. Justyna Domienik-Karłowicz, MD, PhD, é uma médica com muitos anos de experiência no cuidado de pessoas com obesidade grave, incluindo pacientes bariátricos. Ela presta cuidados em todas as etapas do tratamento, incluindo diagnóstico, qualificação cirúrgica, cuidados pós-operatórios e suporte a longo prazo.

Ela é uma especialista reconhecida no tratamento da obesidade. Ela treina médicos através de sessões de formação e workshops sobre métodos atuais. Ela fala frequentemente em conferências da Sociedade Polaca de Cardiologia e da Sociedade Polaca de Hipertensão. Ela também participa em reuniões para pessoas com obesidade. O seu trabalho ajuda a melhorar os padrões de cuidados bariátricos na Polónia.

O Professor Kim Ki-bong é especialista em CRM (cirurgia de revascularização do miocárdio), cirurgia valvular, fibrilação atrial e transplante cardíaco. Ele é Diretor dos Centros de Cirurgia Cardíaca e Cardiovascular do Hospital Myongji. Foi pioneiro em cirurgias de ponte de safena avançadas na Coreia. Possui vasta experiência em CRM sem circulação extracorpórea (OPCAB) e integra a equipe de cirurgia cardíaca totalmente endoscópica (TECAB) utilizando o sistema da Vinci Xi.

Em 2025, sua equipe realizou a primeira CRM totalmente endoscópica da Coreia sem circulação extracorpórea. Em agosto de 2026, realizaram a primeira cirurgia TECAB multivascular do país.

É ex-presidente do Departamento de Cirurgia Torácica e Cardiovascular da Faculdade de Medicina da Universidade Nacional de Seul. Também foi chefe do mesmo departamento no Hospital da Universidade Nacional de Seul. Atua no Conselho Editorial da revista The Annals of Thoracic Surgery. É membro da AATS, STS e EACTS. Foi presidente das Sociedades Coreanas de Cirurgia de Artéria Coronária, Tratamento Cirúrgico de Arritmias e Cirurgia Torácica e Cardiovascular. Sua produção científica inclui mais de 130 artigos internacionais e mais de 140 artigos coreanos. Ministrou mais de 80 palestras internacionais e mais de 80 coreanas. Obteve seu MD, Mestrado e Doutorado na Universidade Nacional de Seul.

O médico é especializado no tratamento abrangente de doenças cardiovasculares, com foco clínico principal em doenças das artérias coronárias, incluindo o tratamento de oclusão cardiovascular e ataques cardíacos. A experiência estende-se ao diagnóstico e tratamento da hipertensão e hiperlipidemia, bem como ao tratamento de doenças das válvulas cardíacas e vários distúrbios do ritmo ou arritmias.

Além da gestão clínica, o médico possui alta qualificação em cardiologia intervencionista, realizando especificamente procedimentos coronários e angiografia diagnóstica para tratar problemas vasculares complexos.

O médico é um cirurgião altamente qualificado especializado em cirurgia de trauma para adultos e crianças. Com vasta experiência em ortopedia, o médico concentra-se em procedimentos artroscópicos para joelho, ombro e tornozelo, bem como em cirurgias complexas de substituição articular, incluindo próteses de joelho, quadril e ombro.

Além da reconstrução articular, o médico oferece atendimento especializado em correção de deformidades e cirurgia de alongamento de membros. A prática também abrange a cirurgia esportiva, tratando lesões atléticas para restaurar a função e a mobilidade de pacientes de todas as idades.

O Dr. Erkan Karatas é cirurgião otorrinolaringologista e maxilofacial no Hospital Universitário Atlas, em Istambul. Especializa-se em cirurgia da base do crânio e colocação de implantes cocleares. O Dr. Karatas contribuiu para mais de 100 artigos médicos. Concluiu formação especializada em centros de prestígio nos EUA, Alemanha, Itália e Suíça.

• Membro de 11 associações profissionais, incluindo a Academia Americana de Otorrinolaringologia.
• Especialista em cirurgias complexas de cancro da tiroide, língua e laringe.
• Realiza procedimentos especializados como estapedectomia, timpanoplastia e cirurgia ortognática.
• Trabalha num hospital acreditado pela AACI que trata 565.000 pacientes anualmente.

O Dr. Ercan Kocakoc é um radiologista premiado no Hospital Medical Park Bahcelievler em Istambul. Ganhou o 1º Prémio no congresso ESGAR de 2009 por casos clínicos. O Dr. Kocakoc especializa-se em radiologia de intervenção e imagiologia corporal avançada. Concluiu uma bolsa de investigação no Hospital Universitário de Cleveland, nos EUA.

• Realiza quimioembolização e radioembolização hepática para doentes oncológicos.
• Trata doenças urológicas através de procedimentos como a embolização de varicocele.
• Ocupou cargos de chefia nas universidades Bezmialem Vakif e Yeditepe.
• Membro da Sociedade Europeia de Radiologia Gastrointestinal e Abdominal.

O médico é um cardiologista altamente qualificado com vasta experiência clínica no diagnóstico e tratamento de condições cardiovasculares complexas. O foco profissional do médico inclui o tratamento da hipertensão, oclusão cardiovascular, insuficiência cardíaca e distúrbios do ritmo cardíaco. Além disso, o médico é especialista no tratamento do colesterol alto e no manejo de doenças cardíacas congênitas.

O médico concluiu a formação médica na Universidade Médica do Azerbaijão e, posteriormente, realizou uma formação especializada em cardiologia na Faculdade de Medicina da Universidade de Kocaeli, entre 2017 e 2023. Graças a esta rigorosa formação académica e clínica, o médico presta cuidados abrangentes a pacientes com diversas necessidades de saúde cardíaca.

O médico é especializado no manejo abrangente de condições cardiovasculares, com foco clínico em doenças das artérias coronárias, incluindo oclusão cardiovascular e infarto do miocárdio. A experiência estende-se ao tratamento de hipertensão, hiperlipidemia e insuficiência cardíaca.

Além disso, o médico oferece atendimento especializado para doenças das válvulas cardíacas, distúrbios do ritmo (arritmias) e condições vasculares periféricas, tratando especificamente doenças vasculares das pernas e cervicais.

O médico é um radiologista experiente com um vasto histórico clínico em múltiplas instituições médicas. A sua carreira profissional inclui cargos na clínica de radiologia da Universidade Erciyes de Kayseri e no Hospital Estatal de Kayseri, bem como funções em diversos centros médicos privados, incluindo o Academy Medical Center, o Anaclinic Medical Center e a clínica de radiologia do Hospital Liman.

Com uma carreira focada em diagnóstico por imagem, o médico prestou serviços radiológicos no centro médico privado Samsun Private Midiliv e, mais recentemente, no hospital Samsun Büyük Anadolu. O médico possui uma experiência abrangente em radiologia clínica, contribuindo para a precisão diagnóstica e o atendimento ao paciente em diversos ambientes de saúde.

O médico é um radiologista altamente versátil com vasta experiência em uma ampla gama de modalidades de imagem diagnóstica e intervencionista. A proficiência clínica inclui radiologia abdominal, Doppler, obstétrica, mamária, musculoesquelética, pediátrica e neurorradiologia, garantindo suporte diagnóstico abrangente para diversas populações de pacientes.

Além da imagem diagnóstica, o médico é qualificado na realização de procedimentos intervencionistas não vasculares, fornecendo soluções minimamente invasivas para condições clínicas complexas. Essa abordagem multidisciplinar permite precisão diagnóstica exata e intervenção terapêutica eficaz em várias especialidades médicas.