A 48-year-old woman with a history of recurrent right lower lobe pneumonia (3 episodes in 18 months) undergoes CT thorax. The imaging reveals a focal bronchial narrowing at the origin of the superior segmental bronchus of the right lower lobe with post-obstructive atelectasis. Bronchoscopy confirms a 1.2 cm endobronchial lesion. What is the most appropriate next step in management?

Explanation

## Management of Endobronchial Lesion with Post-obstructive Atelectasis **Key Point:** Any endobronchial lesion visualized on bronchoscopy requires tissue diagnosis before definitive management. Biopsy is the standard of care to establish histology and guide treatment. ### Clinical Context The patient presents with: - Recurrent pneumonia in the same lobe (suggests obstruction) - CT findings of focal bronchial narrowing at the superior segmental bronchus origin - Bronchoscopic visualization of a 1.2 cm lesion - Post-obstructive atelectasis (indirect evidence of obstruction) **High-Yield:** Post-obstructive pneumonia and atelectasis are classic presentations of endobronchial obstruction. The differential includes malignancy, benign tumours (hamartoma, papilloma), foreign body, or stricture. ### Diagnostic Algorithm ```mermaid flowchart TD A[Endobronchial lesion visualized on bronchoscopy]:::outcome --> B{Tissue diagnosis obtained?}:::decision B -->|No| C[Perform endobronchial biopsy]:::action C --> D[Send for histopathology]:::action D --> E{Malignancy?}:::decision E -->|Yes| F[Staging + surgical/oncologic management]:::action E -->|No| G[Benign lesion - assess symptoms]:::outcome G --> H{Symptomatic?}:::decision H -->|Yes| I[Bronchoscopic resection or lobectomy]:::action H -->|No| J[Observe with follow-up imaging]:::action B -->|Yes| K[Proceed to definitive management]:::action ``` **Clinical Pearl:** Endobronchial lesions causing recurrent post-obstructive pneumonia are an indication for tissue diagnosis because: 1. Malignancy must be excluded (especially in a 48-year-old with recurrent infections) 2. Histology determines prognosis and treatment options 3. Benign lesions may not require surgery if asymptomatic ### Why Biopsy Is Essential | Finding | Implication | Next Step | | --- | --- | --- | | Squamous cell carcinoma | Malignancy | Staging, PCI/chemotherapy, or surgical resection | | Hamartoma | Benign | Observe if asymptomatic; resect if symptomatic | | Papilloma | Benign/low-grade malignancy | Bronchoscopic resection ± surveillance | | Stricture/scar | Non-neoplastic | Bronchoscopic dilation or observation | **Mnemonic:** **BIOPSY FIRST** — Before any definitive surgical intervention, obtain tissue diagnosis to guide management intensity and type.