|Year : 2022 | Volume
| Issue : 2 | Page : 88-89
Cavitating lung lesion
M Vishnu Sharma, S V Naseeha Mohammed
Department of Respiratory Medicine, A J Institute of Medical Sciences and Research Centre, Mangalore, Karnataka, India
|Date of Submission||11-Jun-2022|
|Date of Decision||18-Jul-2022|
|Date of Acceptance||03-Aug-2022|
|Date of Web Publication||23-Dec-2022|
Dr. M Vishnu Sharma
Department of Respiratory Medicine, A J Institute of Medical Sciences and Research Centre, Kuntikana, Mangalore, Karnataka
Source of Support: None, Conflict of Interest: None
|How to cite this article:|
Sharma M V, Mohammed S V. Cavitating lung lesion. J Assoc Pulmonologist Tamilnadu 2022;5:88-9
| Question|| |
A 63-year-old male was admitted for evaluation. He had low-grade, intermittent fever, cough with scanty sputum, and anorexia for the past 2 weeks. No hemoptysis was noted. He was on regular immunosuppressive therapy for rheumatoid arthritis for the past 4 years. His arthritis was under control. He had no previous respiratory symptoms. He had no evidence of rheumatoid lung disease before these symptoms. He was a nonsmoker. A chest X-ray posteroanterior [Figure 1] and lateral view [Figure 2] was taken. What is the most likely diagnosis and what are the differentials?
| Answer|| |
Chest X-ray shows multiple cavities with small air–fluid level with infiltrates on the left side and a small cavity with surrounding infiltrates on the right side. Most likely diagnosis is pulmonary tuberculosis. Sputum acid-fast Bacillus smear was done, which confirmed the diagnosis. The most common cause of cavitating lung lesion is pulmonary tuberculosis.
Cavity in pulmonary tuberculosis most commonly occurs in the upper lobes, which can be unilateral or bilateral, single or multiple, usually without any significant air–fluid level, thin-walled, and surrounded by parenchymal infiltrates. Cavity may show air–fluid level when there is superadded bacterial infection in a tubercular cavity. Chronic cavity and secondary bacterial infection can lead to increased wall thickness of tubercular cavity.
Differential diagnosis for multiple cavitory lesions in lung
- Mycobacterial infections
- Mycobacterium tuberculosis (most common cause worldwide)
- Nontubercular mycobacterial infections (less common)
- Bacterial infections
- Staphylococcus aureus
- Klebsiella pneumoniae
- Pseudomonas aeruginosa
- Anaerobes/aspiration pneumonia
- Septic emboli
- Bacterial pneumonia in an immunocompromised host
- Fungal infections,
- Usually occurs in immunocompromised host
- Autoimmune diseases
- Granulomatosis with polyangiitis
- Rheumatoid arthritis
- Cavitating pulmonary metastasis.
When a patient is on immunosuppressive therapy, classical symptoms and signs of infection may be masked. Chest radiology can be atypical in such patients. Radiological lesions may progress very fast. In patients with systemic connective tissue/autoimmune disease, infections are the most common cause of cavity in the lung. In countries with a high prevalence of tuberculosis, the most common cause of cavity in the lung in these patients is tuberculosis.
The pulmonary rheumatoid nodules are rare and occur in less than 1% of patients with rheumatoid arthritis. Up to 70% of these nodules may cavitate. Cavitating rheumatoid nodules are called rheumatic necrobiotic nodules. Pulmonary rheumatoid nodules tend to be peripheral, more commonly seen in the middle and upper zones and subpleural. They can be single or multiple. Chest radiology will often show features of interstitial lung disease in addition to the nodules.
Systematic approach is essential for definitive diagnosis of cavitating lung lesion. Focused history, physical examination, radiological characteristics, and sputum analysis will yield a diagnosis in majority of the cases. Bronchoscopy and/or biopsy may be required in select cases when the diagnosis is uncertain.
The most common cause of cavitating lung lesion is tuberculosis. Systematic approach is essential for a definitive diagnosis of cavitating lung lesion.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2]