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Clinical Challenge | Pathology

Hyponatremia and Right Maxillary Sinus Mass QUIZ

Zi Yang Jiang, MD1; Alexander Katz, MD2; Carrie Francis, MD2,3
[+] Author Affiliations
1The University of Texas Health Science Center at Houston, Houston
2Children’s Mercy Hospital and Clinics, Kansas City, Missouri
3University of Kansas Medical Center, Kansas City, Missouri
JAMA Otolaryngol Head Neck Surg. 2015;141(11):1021-1022. doi:10.1001/jamaoto.2015.2314.
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A teenaged boy had dizziness, vomiting, unstable gait, and headaches; a sodium level of 109 mEq/L; and a mass in the superior right maxillary sinus with extension into the infundibulum. What is your diagnosis?

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Figure.

A, T1-weighted postgadolinium magnetic resonance image, coronal view. B-D, Histopathological images. B, Hematoxylin-eosin, original magnification ×100. C, Tissue positivity for synaptophysin, original magnification ×200. D, Tissue negativity for cytokeratin, original magnification ×200.

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