Successful treatment by high dose glucocorticoid of miliary tuberculosis complicated with acute respiratory distress syndrome: a case report

A 25-year-old previously healthy man presented with a productive cough for 2 months and progressive dyspnea for 1 week. He did not respond to initial anti-infective treatment at a local hospital. Chest computed tomography (CT) demonstrated diffuse miliary nodules, ground-glass opacities throughout both lungs, and bilateral pleural effusion (more prominent on the right). Laboratory tests revealed type I respiratory failure, elevated inflammatory markers, hyponatremia, hypoproteinemia, and raised tumor markers (NSE, CYFRA21-1, SCC, CA125). Sputum acid-fast bacilli smears were negative, but pleural fluid analysis showed elevated adenosine deaminase and interferon-gamma, suggestive of tuberculous pleurisy. Percutaneous lung biopsy confirmed epithelioid granulomas with positive acid-fast staining, establishing the diagnosis of miliary tuberculosis, tuberculous pleurisy, severe pulmonary infection, and acute respiratory distress syndrome (ARDS). Anti-tuberculosis therapy was withheld initially due to elevated liver enzymes and was initiated once liver function normalized. High-dose methylprednisolone (160 mg/day) combined with noninvasive positive pressure ventilation (NIPPV) was added, yielding initial improvement. However, complications arose after 8 days of NIPPV, including pneumothorax, subcutaneous and mediastinal emphysema, and suspected disseminated intravascular coagulation (DIC). NIPPV was discontinued, subcutaneous incision and xiphoid puncture drainage performed, and supportive measures (cryoprecipitate, immunoglobulin, continued glucocorticoids) instituted. Symptoms and imaging gradually resolved. After 1 year of anti-tuberculosis treatment, the patient achieved complete clinical and radiological recovery. This case highlights that, alongside potent anti-tuberculosis therapy, high-dose glucocorticoids combined with NIPPV (with cautious management of barotrauma risks) can effectively control life-threatening miliary tuberculosis complicated by ARDS.