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Akira Fukumoto, MD; Manabu Nonaka, MD; Tomonobu Kamio, MD; Eriko Kamura, MD; Chika Ozu, MD; Shunkichi Baba, MD; Yoshiharu Ohaki, MD

Arch Otolaryngol Head Neck Surg. 2002;128:71-74.

Variability in the location of parathyroid glands is well recognized. There are usually 4 parathyroid glands located in the area of the thyroid gland, but embryologically, they may be found anywhere from the angle of the jaw to the pericardium. We report a case of an ectopic parathyroid gland in the pyriform sinus. It appeared as a tumorous lesion in the pyriform sinus owing to progress of secondary hyperparathyroidism.

From the Departments of Otolaryngology (Drs Fukumoto, Nonaka, Kamio, Kamura, Ozu, and Baba) and Pathology (Dr Ohaki), Chiba Hokusoh Hospital, Nippon Medical School, Tokyo, Japan.

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