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Thorough study is required to decide the appropriate management of hepatic tumors in children. We present a case report of a hepatic embryonal undifferentiated sarcoma with unfavorable prognosis in a nine-year-old girl. After undergoing a detailed cancer characteristics and extension study, a two-stage surgery approach was decided. The hepatic tumor resection was the first procedure to be performed. One week later, under cardiopulmonary bypass, deep hypothermia, and circulatory arrest, thrombectomy of the inferior vena cava and right atrium was accomplished, plus thromboendarterectomy of the right pulmonary artery. During a four-year follow-up, the patient continues to be disease-free.

The incidence of allergic reactions due to mechanical prosthesis or rings is not well established. We report the case of a 56-year-old man who presented a persistent urticarial rash and anaphylactic shock after a mitral valve repair operation. Prick skin tests were positive for nickel. After the nucleus from the mitral annulus was removed, the urticarial rash disappeared.

Aberrant right subclavian artery is the most frequent anomaly of the aortic arch, and in 60% of cases is associated with Kommerell diverticulum. It is usually asymptomatic but may present with dysphagia or asthma due to esophageal and tracheal compression. Indications for surgical repair have not been established; however, when Kommerell diverticulum is complicated by aortic dissection the treatment is surgery. We present the case of a 54-year-old man with thoracic pain due to dissection of an aberrant right subclavian artery associated with Kommerell diverticulum. Elective surgical treatment was performed. Resumo: A artéria subclávia direita aberrante é a anomalia mais frequente do arco aórtico, em 60% dos casos é associada ao divertículo de Kommerell. É geralmente assintomática ou pode apresentar disfagia ou dispneia, devido à compressão do esófago ou traqueia. As indicações para a reparação cirúrgica não foram estabelecidas; no entanto, quando o divertículo de Kommerell é complicado por dissecção aórtica, o tratamento é cirúrgico. Apresentamos um caso de um homem de 54 anos, com dor torácica devido à dissecção de uma artéria subclávia direita aberrante associada ao divertículo de Kommerell. É feito um tratamento cirúrgico preferencial. Keywords: Aberrant, Subclavian, Kommerell, Palavras-chave: Aberrante, Subclávia, Kommerell