Select bleeding volume (streaks vs massive), chronic lung disease (CF, bronchiectasis), fever, weight loss, chest pain, renal symptoms, and smear clues → differentiate infectious (TB, pneumonia), structural (CF, bronchiectasis, foreign body), vascular (pulmonary hemosiderosis, Goodpasture), or neoplastic causes.
⚠️ Red flags: massive hemoptysis (>8 mL/kg/24h), hemodynamic instability, respiratory distress → urgent bronchoscopy, ICU, consider embolization.
Select amount of hemoptysis (streaks vs massive), chronic productive cough, CF history, TB exposure, hematuria, rash, and CXR findings → differential includes cystic fibrosis, bronchiectasis, pulmonary tuberculosis, foreign body aspiration, pulmonary hemosiderosis (Goodpasture), AV malformation, and coagulopathy.