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Pulmonology / Respiratory

MAC Lung Disease (Nodular Bronchiectatic / Lady Windermere)

ICD-10 Code
A31.0

Clinical Criteria for MAC Lung Disease (Nodular Bronchiectatic / Lady Windermere).

Clinical Presentation & Protocol

Patient Usually Complains Of

Patient presents with a chronic, productive cough, often associated with fatigue, malaise, and occasional hemoptysis. History is significant for long-standing indolent respiratory symptoms, often with a "Lady Windermere" phenotype (voluntary cough suppression). No constitutional symptoms of night sweats or significant weight loss. Symptoms are slowly progressive over months to years.

Clinical Examination Findings

General appearance: Patient is typically thin, often with a slender habitus. Chest auscultation: Focal or diffuse crackles, particularly in the right middle lobe or lingula. Percussion: Normal. Cardiac: Regular rhythm, no murmurs. Extremities: No clubbing or edema. Vital signs: Stable, afebrile.

Treatment Protocol

Treatment initiated with a multi-drug regimen: Clarithromycin (or Azithromycin), Rifampin, and Ethambutol. Airway clearance therapy (ACT) prescribed, including hypertonic saline nebulization and oscillating positive expiratory pressure (OPEP) devices. Monitoring: Baseline and serial visual acuity/color vision testing (for Ethambutol) and audiometry. Monthly sputum cultures for AFB to assess treatment response.

Detailed clinical guide coming soon.