Abstract
Description of case(s): A 73-year-old man with advanced gastric cancer was referred for CT evaluation of staging. The patient had no past history of allergy and never received iodinated compounds. CT was performed after intravenous injection of 140 mL of low osmolality contrast agent: Ioxaglate (Hexabrix 320, Gerbet, France). Within 10 minutes after the CT scan, he complained of progressive swelling of the submandibular area. Physical examination revealed swelling of the bilateral submandibular gland with mild tenderness. Ultrasonography of the neck was performed with a 7–10 MHz linear array transducer. Ultrasonography showed diffuse swelling and internal low-echoic thick septa of bilateral submandibular glands. However, the parotid and thyroid glands were not swollen. About 1 hour after the CT scan, swelling of submandibular gland started to regress and return to normal the next day.
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