Pulmonary hypertension (PHT) in the ICU is mostly seen in cardiac surgery patients, in patients with acute respiratory distress syndrome or pulmonary embolism. However,there is
a broad differential diagnosis. In this case report we present a patient, who rapidly developed PHT with right sided heart failure and who was unresponsive to medical therapy. The diagnosis of "Pulmonary Tumor Thrombotic Microangiopathy (PTTM)" was suspected. PTTM is a fatal, cancer-related pulmonary complication, characterized by progressive dyspnoea, pulmonary hypertension and right-sided heart failure.
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