Approaching chronic cough.

Area of Science:

• Respiratory Medicine
• Pulmonology
• Clinical Diagnosis

Background:

• Chronic cough is a frequent reason for specialist referral.
• While rarely fatal, it significantly impacts patient quality of life.
• Identifying the cause is crucial for effective management.

Purpose of the Study:

• To outline common and less frequent causes of chronic cough in patients with normal chest radiographs.
• To emphasize the diagnostic utility of detailed history and physical examination.
• To guide primary care physicians in managing chronic cough.

Main Methods:

• Review of common etiologies for chronic cough.
• Analysis of diagnostic approaches including history, physical examination, and further investigations.
• Consideration of patient data from Western and local sources.

Main Results:

• In patients with normal chest X-rays, common causes include postnasal drip syndrome, postinfectious cough, gastro-oesophageal reflux disease, and cough variant asthma.
• Less common causes identified are angiotensin-converting enzyme inhibitor use, smoker's cough, and nonasthmatic eosinophilic bronchitis.
• A thorough patient history and physical examination are often sufficient for diagnosis at the primary care level.

Conclusions:

• Most chronic cough cases with normal chest X-rays are attributable to a few key conditions.
• Initial diagnosis can frequently be achieved in primary care settings.
• Specialist referral and further investigations are reserved for complex or undiagnosed cases.