A 20-year-old college student presents with a 6-day history of low-grade fever (38.2°C), headache, malaise, and persistent dry cough. Vital signs show HR 102/min, RR 24/min, BP 118/76 mmHg, SpO2 98% on room air. Chest examination reveals only scattered end-inspiratory crackles. Chest X-ray demonstrates diffuse patchy interstitial infiltrates appearing disproportionately severe compared to clinical findings. LDH is elevated at 680 U/L. Which of the following additional findings is most likely?
- A)Rust colored sputum and lobar consolidation
- B)Cold agglutinin mediated hemolysisGABARITO
- C)Cavitary lesion with foul smelling sputum
- D)Currant jelly sputum in an alcoholic patient
- E)Eosinophilia with central bronchiectasis
Explicação
Cold agglutinin mediated hemolysis is correct. Mycoplasma pneumoniae causes atypical walking pneumonia in young adults and can trigger IgM cold agglutinins directed against red blood cells. The chest x ray often looks more impressive than the mild physical fin... Ver explicação completa e trilha adaptativa →