Management of Cough with Peribronchial Thickening on Chest X-ray

Initial Assessment and Classification

The American College of Chest Physicians recommends classifying cough by duration - acute (<3 weeks), subacute (3-8 weeks), or chronic (>8 weeks) 1
A patient's presentation with cough and abnormal breath sounds, along with X-ray findings of prominent lung markings and mild peribronchial thickening, is most consistent with acute bronchitis or possible early asthma exacerbation 1, 2

The chest X-ray showing no discrete consolidation, no pleural effusion, no pneumothorax, and no cardiomegaly effectively rules out pneumonia, heart failure, and other serious conditions 1, 3
Assess for "red flags" that would warrant more aggressive management, including hemoptysis, significant dyspnea, fever, weight loss, or recurrent pneumonia - none of which appear to be present in this case 1

The American College of Chest Physicians recommends supportive care as the mainstay of treatment for patients with acute cough and peribronchial thickening without signs of severe disease 1, 2
Recommend adequate hydration to help thin secretions and facilitate expectoration 2
Use a validated tool such as a cough severity scale (0-10) to objectively monitor response to treatment 1

Spirometry with bronchodilator response should be performed to assess for underlying asthma, particularly if symptoms persist beyond 2-3 weeks, according to the American Thoracic Society 4

Schedule follow-up in 4-6 weeks to reassess symptoms and response to treatment 1
If symptoms persist beyond 3 weeks, reclassify as subacute cough and consider additional evaluation for postinfectious cough, asthma, or upper airway cough syndrome 1, 2
If symptoms persist beyond 8 weeks despite appropriate therapy, chest CT may be indicated to evaluate for bronchiectasis or other structural abnormalities not visible on chest X-ray, as recommended by the American College of Radiology 5, 6

Avoid routine use of antibiotics for uncomplicated acute bronchitis as most cases are viral in etiology, according to the American College of Chest Physicians 2
If the patient is on an ACE inhibitor, consider discontinuation as these medications can cause persistent cough, as suggested by the American Heart Association 4

Chest CT is not recommended as initial evaluation for acute cough with normal or near-normal chest X-ray findings, according to the American College of Radiology 5, 6
Consider chest CT only if symptoms persist despite appropriate therapy, if there are recurrent episodes, or if there are concerning features on chest X-ray, as recommended by the American College of Radiology 3, 6

Monitor for progression to pneumonia, which would present with worsening symptoms, fever, and new consolidation on imaging, according to the American College of Chest Physicians 1