[Internal jugular vein thrombosis as a paraneoplastic syndrome].

Thrombosis of the internal jugular vein is a rare form of deep vein thrombosis with potentially life threatening complications. We report on a 46-year-old male presenting with dysphagia and neck swelling. An extensive thrombosis of the internal jugular vein was found on ultrasound of the neck. An interdisciplinary workup revealed an occult gastric carcinoma. This case demonstrates that concomitant malignancies may contribute to a thrombosis of the internal jugular vein, which is then the primary symptom presented by the patient.