CTICasesPneumocystis jirovecii Pneumonia during Dapsone Prophylaxis
[...]. Pneumocystis jirovecii Pneumonia during Dapsone Prophylaxis. CTICases. Published October 1, 2026. https://cticases.com/c/ke6ab
Imaging findings
A clean CT in June is followed by a September radiograph with vague opacities, most noticeable in the right lung. CT confirms mild bilateral ground-glass opacity. A radiograph a few days later shows much denser bilateral opacities as the infection progressed.
Key takeaways
Patients with Pneumocystis pneumonia often have severe shortness of breath with relatively mild imaging changes. Pulmonary alveolar proteinosis is the opposite: it can look terrible on imaging with less dyspnea. This patient could not tolerate trimethoprim-sulfamethoxazole and was switched to dapsone, and Pneumocystis broke through. Both Pneumocystis and Nocardia are largely preventable with trimethoprim-sulfamethoxazole prophylaxis.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Rhizopus Bronchitis at the Bronchial Anastomosis after Double Lung TransplantInfection
- Paraesophageal Hiatal Hernia with Intrathoracic Gastric Volvulus and Partial Outlet ObstructionOther
- Disseminated Varicella Pneumonia with Acute Lung Injury after Double Lung TransplantInfection
- Diffuse Idiopathic Pulmonary Neuroendocrine Cell Hyperplasia (DIPNECH)Neoplastic
- Trimethoprim-Sulfamethoxazole (Bactrim)-Induced Acute Eosinophilic Pneumonia Progressing to ARDS and FibrosisILD
- Pulmonary Nocardiosis in a Stem Cell Transplant RecipientInfection
- Morgagni Hernia Containing Omental FatCongenital
- Complicated Silicosis with Progressive Massive Fibrosis in a Well Digger and Concrete CutterExposure
See all cases from October 1, 2026 →
Related Infection cases
- Disseminated Histoplasmosis Mimicking Sarcoidosis in a Liver Transplant Recipient
- Pulmonary Tuberculosis Presenting as Digital Osteomyelitis
- Pulmonary Nocardiosis in a Lung Transplant Recipient
- Burkholderia gladioli Pneumonia in a Heart Transplant Recipient
- Pulmonary Mucormycosis (Cunninghamella) in a Stem Cell Transplant Recipient
- Bacillus cereus Pneumonia in a Stem Cell Transplant Recipient