Granulomatous lymphadenitis caused by Coccidioides immitis

Area of Science:

• Mycology
• Infectious Diseases
• Immunology

Background:

• Coccidioides immitis is a dimorphic fungus endemic to the southwestern United States, Mexico, and Central America.
• Inhalation of infectious mycelial spores from dust primarily affects the lungs, causing a spectrum of disease from asymptomatic to disseminated forms.
• Diagnosis relies on methods like biopsy, culture, serology, or skin testing, each with limitations.

Observation:

• This report presents a case of granulomatous lymphadenitis caused by Coccidioides immitis.
• The diagnosis was established in the eastern United States, an area not typically associated with this endemic fungus.
• A lymph node biopsy was the key diagnostic tool used in this case.

Findings:

• Granulomatous lymphadenitis can be a manifestation of Coccidioides immitis infection.
• The diagnosis of coccidioidomycosis can occur outside endemic areas.
• Lymph node biopsy is a valuable method for identifying Coccidioides immitis in localized infections.

Implications:

• This case expands the known geographical distribution of Coccidioides immitis diagnosis.
• It underscores the importance of considering coccidioidomycosis in the differential diagnosis of granulomatous lymphadenitis, even in non-endemic regions.
• Diagnostic challenges associated with Coccidioides immitis highlight the need for awareness among clinicians and pathologists nationwide.