Rhino-Orbitocerebral Mucormycosis Caused by Apophysomyces elegans

Author:

Liang Kimberly P.1,Tleyjeh Imad M.1,Wilson Walter R.1,Roberts Glenn D.2,Temesgen Zelalem1

Affiliation:

1. Department of Medicine and Division of Infectious Diseases

2. Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, Minnesota

Abstract

ABSTRACT Rhino-orbitocerebral mucormycosis (ROCM) caused by more common zygomycetes (e.g., Mucor ) is known to cause rapidly fatal infections in immunocompromised patients. Apophysomyces elegans is an emerging zygomycete that has been reported to cause invasive cutaneous and rhino-orbitocerebral infections in immunocompetent individuals. Limited data exist describing the syndrome of ROCM caused by A. elegans . We describe a recent case and performed a comprehensive literature review to delineate the clinical characteristics of ROCM caused by A. elegans . Our case is a 50-year-old man with diabetes mellitus who presented with facial pain and right eye proptosis. Endoscopic sinus sampling revealed A. elegans . He was treated with liposomal amphotericin B and multiple debridements, with no disease on 1.5-year follow-up examination. Seven cases were identified on literature review, including the present case. Most patients (86%) were male, with a mean age of 40 years. Most patients (71%) did not have predisposing medical conditions. Three patients had predisposing head trauma. All presented with facial and/or periorbital pain. All had magnetic resonance imaging or computed tomography of the head showing intraorbital and/or sinus inflammation. Diagnosis was confirmed by histopathology and deep tissue culture in all cases. All patients required eye exenteration and extensive surgical debridement, in addition to intravenous amphotericin B. Six of the seven patients (86%) recovered. ROCM caused by A. elegans is rarely reported in the literature. Most such infections occurred in immunocompetent patients, often after facial trauma. Survival in ROCM caused by A. elegans is favorable in reported cases, with prompt surgical debridement and antifungal therapy.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

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