This document summarizes information about two asthma case studies. It includes details about the patients' symptoms, examination findings, lab and imaging results, diagnoses, and treatment plans. The first case involves a 66-year-old man who had an asthma exacerbation after stopping his medications. The second case involves a 16-year-old girl with a history of asthma who presented with shortness of breath. The document also provides background information on asthma including definitions, pathophysiology, clinical assessment findings, diagnostic tests and their results, differential diagnosis, disease classification guidelines, and treatment approaches.