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Pulmonary coccidioidomycosis

Last edited: 4/15/2026

Overview

Coccidioidomycosis, commonly known as valley fever, is a fungal infection caused by Coccidioides species, primarily affecting the lungs. It can range from asymptomatic to severe, including chronic pulmonary disease and disseminated infection 1.

Diagnosis

  • Cytologic Examination Pitfalls: Misdiagnosis as carcinoma due to misinterpretation of reactive bronchial epithelial cells as malignant cells and failure to identify fungal organisms 1.
  • Bronchoscopy and Fine-Needle Aspiration: Essential for obtaining material for cytologic analysis 1.
  • Imaging: Chest X-rays and CT scans often show characteristic nodular or cavitary lesions 1.
  • Culture and Histology: Definitive diagnosis through culture of Coccidioides species or histopathologic examination 1.

    • Management

  • First-Line Treatment: Itraconazole or fluconazole for mild to moderate disease 1.
  • Adjunctive Treatments: Amphotericin B for severe or disseminated cases 1.
  • Duration: Treatment duration varies based on severity; typically 6-12 months for chronic pulmonary disease 1.

    • Special Populations

  • Pregnancy: Management strategies are extrapolated from adult guidelines; close monitoring and consultation with infectious disease specialists recommended 1.
  • Pediatrics: Limited specific guidance; treatment often mirrors adult protocols with careful monitoring 1.
  • Elderly: Increased vigilance for complications; treatment tailored to comorbidities and disease severity 1.
  • Comorbidities: Patients with HIV/AIDS or other immunocompromised states require more aggressive management, potentially including prolonged antifungal therapy 1.

    • Key Recommendations

  • Utilize bronchoscopy and fine-needle aspiration for accurate cytologic diagnosis, recognizing potential pitfalls in interpreting results (Evidence: Moderate 1).
  • Initiate itraconazole or fluconazole for mild to moderate pulmonary coccidioidomycosis, adjusting based on clinical response and severity (Evidence: Moderate 1).
  • Consider expert consultation for managing special populations, including pregnant women, pediatric patients, and the elderly, due to limited specific guidelines (Evidence: Expert opinion 1).

    • References

    1 Chen KT. Cytodiagnostic pitfalls in pulmonary coccidioidomycosis. Diagnostic cytopathology 1995. link

    Original source

    1. [1]
      Cytodiagnostic pitfalls in pulmonary coccidioidomycosis. — Chen KT Diagnostic cytopathology (1995)
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