RESUMO
De-differentiated primary mediastinal liposarcomas account for less than 1% of all liposarcoma pathology. We report the case of an 82-year-old male who was suffering from progressive dysphagia, shortness of breath, and dysphonia for a period of 2 months. A CT scan of the chest with contrast revealed a large heterogeneously enhancing posterior mediastinal mass extending into the posterior soft tissues of the neck, abutting bilateral carotid arteries, and displacing the trachea and esophagus. Treatment chosen for our patient was surgical resection followed by adjuvant radiation therapy which resolved the patient's presenting symptoms. The insights gained through the diagnosis, management, and treatment of our patient can be utilized to approach this type of rare neoplasm.