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Lady Windermere syndrome refers to a form of pulmonary infection by non-tuberculous mycobacteria (NTM), most often Mycobacterium avium–intracellulare complex (MAC), that presents with nodular–bronchiectatic disease localized to the right middle lobe and lingula in elderly, thin, non-smoking women without pre-existing lung disease.

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It was named after “Lady Windermere” (from Oscar Wilde’s play Lady Windermere’s Fan), suggesting voluntary suppression of cough due to cultural restraint in well-mannered women, leading to poor clearance of secretions from dependent lung regions.

Etiopathogenesis

• Organism: Most often MAC; occasionally M. abscessus.

Predisposing factors:

• Elderly, postmenopausal women, often with low BMI.
• No smoking or occupational exposure.
• Theories: voluntary cough suppression, chest wall anatomy, and host immune factors (defective mucociliary clearance).

Pathology:

• Chronic endobronchial colonization by NTM.
• Leads to small-airway inflammation, bronchiectasis, and progressive parenchymal infection.

Clinical Features

• Chronic, indolent course.
• Persistent dry or productive cough.
• Fatigue, malaise, weight loss.
• Low-grade fever, occasional hemoptysis.
• Often misdiagnosed as asthma, COPD, or recurrent pneumonia.

Diagnosis