Metastases to the heart and pericardium are discovered at autopsy in 10%–12% of all patients with malignancies. The most common primary tumor involving the pericardium is lung cancer, followed by breast, melanoma, and lymphoma. Pericardial effusion may be the result of the tumor spreading to the visceral pericardium which increases production of fluid, or accumulation of the fluid due to the obstruction of venous and lymphatic outflow. A malignant pericardial effusion is associated with decreased survival rate. We present a 72 year-old woman, former smoker with dyslipidemia and psoriatic arthritis as well as previous bladder carcinoma that was healed in 1986. On august 2017 after an acute intestinal obstruction she was diagnosed with stage IV ileum adenocarcinoma treated initially with palliative chemotherapy (Capecitabine and oxaliplatin) that was suspended for poor tolerance and according to patient desire. Few months later the patient complained of rapidly progressive dyspnoea that prevented her normal life activity, arterial pressure and blood oxygen saturation was normal, but she was tachycardic. Echocardiogram was performed (see figure) which showed marked pericardial nodular thickening and severe pericardial effusion with echocardiographic signs of cardiac tamponade. Curiously, pericardial effusion was dense and markedly hyperechogenic. A computed tomography (CT) was performed to rule out pericardial carcinomatosis and find out the pericardial fluid composition and demostrated several pericardial nodular thickenings that suggested metastases. The pericardial fluid was dense (40 hounsfield units) and consistent with blood. After multidispiplinar consultation and in accordance with patients wishes a palliative pericardial window was performed and hematic pericardial fluid was obtained. Pericardial liquid citology demonstrates atipical cells compatible with carcinoma and pericardial biospy showed fibrinous pericarditis and reactive mesothelial hyperplasia. Pericardial carcinomatosis consists of macroscopic or microscopic affection of pericardial layers. Metastasis from colorectal cancer to the pericardium is uncommon, and usually indicates terminal stage with multiple metastases, only a few cases have been reported. Malignant Pericardial effusions in patients with cancer may also be triggered by other mechanism than cancer itself, including chemotherapy, radiation therapy, and, less commonly, an infectious disease. Whereas echocardiography is most frequently used to examine the heart and pericardium, multimodaliy imaging with magnetic resonance (MR) or/and CT offer advantages when dealing with metastatic disease. Abstract 1101 Figure. Echocardiogram and CT images

Más del 50% de los derrames pericárdicos en pacientes oncológicos son debidos a otro proceso no maligno y por tanto es fundamental establecer la causa por sus connotaciones pronósticas y terapéuticas. La ecocardiografía transtorácica es la técnica de elección para la valoración del pericardio, pero en ocasiones la imagen multimodal puede ayudar. La tomografía computarizada (TC) ha surgido como una alternativa para determinar la cantidad y distribución del líquido y caracterizar los engrosamientos, masas y el propio líquido pericárdico, por lo que aporta información útil para determinar su etiología y guiar su drenaje. A través de un caso clínico, repasaremos brevemente la utilidad de la TC en la enfermedad pericárdica.