Necrotizing Granulomatous Pneumocystis Infection Presenting as a Solitary Pulmonary Nodule: A Case Report and Review of the Literature

Pneumocystis jirovecii is an opportunistic fungus that is classically associated with pneumonia in immunocompromised patients, particularly those with human immunodeficiency virus and acquired immunodeficiency syndrome (HIV/AIDS). However, this infection is now more commonly seen in those with malig...

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Bibliographic Details
Published in:Case reports in pulmonology 2022-07, Vol.2022, p.1-6
Main Authors: Assaad, Mansur, Swalih, Mohamed, Karki, Apurwa
Format: Article
Language:English
Subjects:
Acquired immune deficiency syndrome
AIDS
Antibiotics
Asymptomatic
Bacterial pneumonia
Biopsy
Case Report
Case reports
Cellular biology
Colorectal cancer
Diagnostic tests
Dyspnea
Granulomas
Health aspects
HIV
Human immunodeficiency virus
Immune system
Infections
Kidney transplants
Lavage
Leukemia
Lymphatic system
Lymphoma
Medical research
Medicine, Experimental
Patients
Pentamidine isethionate
Pneumonia
Thoracic surgery
Tomography
Ultrasonic imaging
Vincristine
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Summary:Pneumocystis jirovecii is an opportunistic fungus that is classically associated with pneumonia in immunocompromised patients, particularly those with human immunodeficiency virus and acquired immunodeficiency syndrome (HIV/AIDS). However, this infection is now more commonly seen in those with malignancy, particularly lymphoproliferative disorders. Classic image findings with Pneumocystis jirovecii pneumonia (PJP) include bilateral ground-glass opacities with or without cyst formation. Up to 5% of patients with PJP may present with atypical image findings, specifically nodular opacities or masses thought to represent granulomatous inflammation. The differential diagnosis for a new solitary pulmonary nodule in an immunocompromised patient is broad. One must first rule out a recurrence of malignancy or new primary malignancy. In our patient’s case, two nondiagnostic bronchoscopies with EBUS-TBNA eventually led to a surgical resection, which revealed a diagnosis of nodular necrotizing granulomatous Pneumocystis jirovecii. The diagnostic yield from EBUS is not well established, and most cases require surgical biopsy for definitive diagnosis. Further data regarding the use of EBUS-TBNA in diagnosing granulomatous PJP is needed.
ISSN:2090-6846
2090-6854
DOI:10.1155/2022/7481636