A case of a Warthin's tumor with suspected metastasis of a floor cancer to the lymph node in the parotid gland

Abstract

We experienced a 44-year-old male patient suspected of parotid lymph node metastasis in image diagnosis of oral floor cancer. The signal strength and type of the left parotid gland tumor were found to be more or less similar to the superior lymph node in the T1 and T2 weighted images in MRI. Ultrasonic tests revealed low echo images of parotid gland tumor in internal parts with slightly vague boundaries. Ga scintigraphy showed mild uptake at the left parotid gland, while Tc-99m salivary gland scintigraphy showed consistent uptake on the left and right sides. Suspecting parotid lymph node metastasis, neck dissection and en blok resection including the left parotid gland tumor were performed combined with frozen section biopsy. Sof t tissue was promptly reconstructed using fore arm flap. The pathological diagnosis of the parotid gland tumor was Warthin's tumor.