Metástases hepáticas de primário difícil de encontrar
2017
EnglishMetastatic Cancer of Unknown Primary Site (CUP) accounts for approximately 3-5% of all malignant neoplasms and is therefore one of the 10 most frequent cancer diagnoses. Modern imaging technology and extensive work-up with specific pathology investigations (immunohistochemistry, electron microscopy and molecular diagnosis) have resulted in some improvements in diagnosis; however, the primary site remains unknown in most patients, even on autopsy. The most prevalent sites of primary tumors origin are the lung and pancreas. CUP is diagnosed at a metastatic stage, conferring an unfavorable prognosis. The liver is one of the most common organs to be involved with metastatic disease, which arises most frequently from primary sites in the colon. A total colonoscopy is the gold standard for the evaluation of the colon. We present a 64-year- -old man with no remarkable past medical history, which presented to the Emergency Service with right flank pain. The abdominal ultrasound revealed diffuse lesions suggestive of hepatic metastases. A computerized tomography (CT) scan showed thickening of ascending colon, but upper and lower endoscopies (with a good view of the ileocecal valve) and other diagnostic procedures were unremarkable portuguesO cancro de primario desconhecido e responsavel por cerca de 3-5% de todas as neoplasias malignas e e, portanto, um dos 10 diagnosticos de cancro mais frequentes. A tecnologia de imagem moderna e o estudo anatomopatologico desenvolvido (imuno-histoquimica, microscopia eletronica e diagnostico molecular) resultaram na melhoria do diagnostico; no entanto, os primarios permanecem ocultos na maioria dos doentes, mesmo pos-autopsia. Os locais mais comuns de origem sao os tumores do pulmao e pâncreas. O cancro de origem desconhecida e diagnosticado num estadio metastatico, conferindo um prognostico desfavoravel. O figado e um dos orgaos mais comumente envolvido na doenca metastatica, que surge com mais frequencia de primarios no colon. A colonoscopia e o gold standard para avaliacao da mucosa do colon e reto. E apresentado um doente de 64 anos, sem historia medica de relevo, que recorreu ao servico de urgencia por dor no flanco direito. A ecografia abdominal revelou metastizacao hepatica difusa. A tomografia computadorizada referia suspeita de espessamento do colon ascendente mas a endoscopia e colonoscopia (com uma boa visibilidade da valvula ileocecal) nao tinham alteracoes.
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