Cryptococcal Pneumonia in an Immunocompetent Patient: A Rare Occurrence.

Area of Science:

• Infectious Diseases
• Pulmonology
• Oncology

Background:

• Cryptococcosis is an invasive fungal infection typically seen in immunocompromised individuals.
• Pulmonary cryptococcosis presents with varied radiographic findings and symptoms mimicking bacterial pneumonia.
• Diagnosis involves fungal cultures, histology, and cryptococcal antigen testing.

Observation:

• A 69-year-old immunocompetent male presented with persistent respiratory symptoms initially treated as pneumonia.
• CT scans revealed infiltrates and consolidations, and bronchoscopy identified lung adenocarcinoma.
• Fungal cultures confirmed *Cryptococcus neoformans* infection.

Findings:

• The patient received fluconazole for cryptococcal pneumonia, showing symptom improvement.
• The case involved a dual diagnosis of cryptococcal pneumonia and lung adenocarcinoma in an immunocompetent host.
• This presentation is unusual, as cryptococcosis predominantly affects immunocompromised patients.

Implications:

• This case underscores the importance of considering fungal etiologies in persistent pneumonia, even in immunocompetent patients.
• It highlights the diagnostic challenge when fungal infections co-exist with malignancies.
• Early recognition and treatment of cryptococcosis are crucial for patient outcomes, especially when underlying conditions like cancer are present.