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Updated: Jan 25, 2026

Retrograde Parotid Gland Infusion through Stensen's Duct in a Non-Human Primate for Vectored Gene Delivery
Published on: August 12, 2021
Parotid Gland Non-Sebaceous Lymphadenoma: A Case Report
Hiroaki Yamanaka1, Hisashi Hasegawa1, Makoto Tanaka1
1Department of Otolaryngology-Head and Neck Surgery, Nihon University School of Medicine, Tokyo, Japan.
Abstract:
We here report a rare salivary gland tumor, a non-sebaceous lymphadenoma (NSLA), in the parotid gland with positive technetium-99m (99mTc) pertechnetate scintigraphy and cervical masses that was difficult to distinguish from malignant lymphoma preoperatively. A 65-year-old Japanese woman presented to our institution with a painless left parotid mass that had been gradually enlarging for three months. Computed tomography and magnetic resonance imaging showed a solid mass (30 mm) in the tail of the left parotid gland with three swellings (each 10 mm) on the periphery of the parotid gland. A low grade malignant lymphoma was diagnosed by fine needle aspiration cytology. Gallium-67 scintigraphy showed mild positivity. On 99mTc pertechnetate scintigraphy, the mild accumulation remained after oral stimulation with a mixture of ascorbic acid and calcium pantothenate. The patient underwent superficial parotidectomy with removal of the cervical masses. Our findings in this patient suggest that 99mTc positivity may constitute a clue to the preoperative diagnosis of NSLA that has pathologically overlapping sites with Warthin tumor.
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