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Volume 32, Number 9—September 2026

Dispatch

Chronic Elbow Nodules Caused by Fomitiporella Fungus in Immunocompetent Patients, United States

Giannoula S. TansarliComments to Author , Bicong Wu, Stephen J. Salipante, and Brad T. Cookson
Author affiliation: University of Washington School of Medicine, Seattle, Washington, USA (G.S. Tansarli, S.J. Salipante, B.T. Cookson); Sanford Laboratory Amber Valley, Fargo, North Dakota, USA (B. Wu)

Main Article

Figure 1

Images of stained tissue specimen from olecranon bursa of case-patient 1 in study of chronic elbow nodules caused by Fomitiporella fungus in immunocompetent patients, United States. A) Hematoxylin and eosin staining shows multiple large expansile back-to-back necrotizing granulomas surrounded by epithelioid histiocytes (arrow). Original magnification ×100. B) Grocott methenamine-silver staining shows many fungal hyphae visible throughout the granulomas (arrows). Original magnification ×400.

Figure 1. Images of stained tissue specimen from olecranon bursa of case-patient 1 in study of chronic elbow nodules caused by Fomitiporella fungus in immunocompetent patients, United States. A) Hematoxylin and eosin staining shows multiple large expansile back-to-back necrotizing granulomas surrounded by epithelioid histiocytes (arrow). Original magnification ×100. B) Grocott methenamine-silver staining shows many fungal hyphae visible throughout the granulomas (arrows). Original magnification ×400.

Main Article

Page created: July 01, 2026
Page updated: August 26, 2026
Page reviewed: August 26, 2026
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