June 2020 — Clinical Microbiology & Infectious Disease

By MCL Education • June 9, 2020

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A 77 year old man presented with 6-8 weeks of right sided neck pain associated with a rapidly enlarging mass, fatigue, and night sweats. A fine needle aspiration of the 7.1 cm hypermetabolic mass showed acute and chronic inflammation. The diagnostic findings on histopathologic examination of an excisional biopsy are shown in the pictures below (Figure 1: H&E and Figure 2: GMS) and were consistent with findings on tissue culture and serologic studies. The patient reported frequent trips to Arizona.

	Rebecca Marrero Rolon, M.D. Fellow, Clinical Microbiology Mayo Clinic
	Bobbi Pritt, M.D. Division Chair, Clinical Microbiology Mayo Clinic Professor of Laboratory Medicine and Pathology Mayo Clinic College of Medicine and Science @ParasiteGal

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This post was developed by our Education and Technical Publications Team.