There are multiple definitions:

1. American Society of Clinical Oncology(English)

   • NCCN, NHB
   • Oncology, Organizations (clinical)
   • https://www.asco.org/

2. asthma-COPD overlap [syndrome](English)

   • characterized by persistent airflow limitation with several features usually associated with asthma and other features usually associated with COPD. Prevalence varies considerably due to differing criteria being applied for diagnosis. There are no specific biomarkers to differentiate ACOS from asthma or COPD
   • COPD
   • Asthma, Respiratory system, Diagnostics
   • https://doi.org…1111/resp.12653