Clinical Note |

A Case of Ectopic Parathyroid Gland Hyperplasia in the Pyriform Sinus

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(1):71-74. doi:10.1001/archotol.128.1.71.
Text Size: A A A
Published online

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.

Figures in this Article

Sign In to Access Full Content

Don't have Access?

Register and get free email Table of Contents alerts, saved searches, PowerPoint downloads, CME quizzes, and more

Subscribe for full-text access to content from 1998 forward and a host of useful features

Activate your current subscription (AMA members and current subscribers)

Purchase Online Access to this article for 24 hours


Place holder to copy figure label and caption
Figure 1.

Barium swallow image shows a regular round mass in the right pyriform sinus (arrow).

Graphic Jump Location
Place holder to copy figure label and caption
Figure 2.

Direct rigid laryngoscopy shows a mass with pedicle from the postlateral wall of the right pyriform sinus.

Graphic Jump Location
Place holder to copy figure label and caption
Figure 3.

Photomicrograph under hematoxylin-eosin stain of parathyroid gland hyperplasia in the pyriform sinus. A, Histologic specimen shows submucosal well-demarcated nodule composed of epithelial cell proliferation (original magnification ×10). B, High-power view shows admixture of clear cells and oxyphilic cells (original magnification ×50).

Graphic Jump Location
Place holder to copy figure label and caption
Figure 4.

The immunohistochemical reaction for chromogranin is strongly positive (original magnification ×50).

Graphic Jump Location




Meets CME requirements for:
Browse CME for all U.S. States
Accreditation Information
The American Medical Association is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians. The AMA designates this journal-based CME activity for a maximum of 1 AMA PRA Category 1 CreditTM per course. Physicians should claim only the credit commensurate with the extent of their participation in the activity. Physicians who complete the CME course and score at least 80% correct on the quiz are eligible for AMA PRA Category 1 CreditTM.
Note: You must get at least of the answers correct to pass this quiz.
You have not filled in all the answers to complete this quiz
The following questions were not answered:
Sorry, you have unsuccessfully completed this CME quiz with a score of
The following questions were not answered correctly:
Commitment to Change (optional):
Indicate what change(s) you will implement in your practice, if any, based on this CME course.
Your quiz results:
The filled radio buttons indicate your responses. The preferred responses are highlighted
For CME Course: A Proposed Model for Initial Assessment and Management of Acute Heart Failure Syndromes
Indicate what changes(s) you will implement in your practice, if any, based on this CME course.
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).
Submit a Comment


Some tools below are only available to our subscribers or users with an online account.

Sign In to Access Full Content

Related Content

Customize your page view by dragging & repositioning the boxes below.

Articles Related By Topic
Related Topics