12Diseases of the respiratory system
Lung diseases due to external agents
Pneumonitis
CA72
category
Mendelson syndrome
Definition This is chemical pneumonitis caused by aspiration during anaesthesia, especially during pregnancy. Aspiration contents may include gastric juice, blood, bile, water or an association of them.
Also indexed as
Mendelson syndrome Mendelson syndrome resulting from a procedure pneumonitis due to inhalation of gastric secretions pulmonary acid aspiration syndrome
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
View this entity in the official WHO ICD-11 browser .
This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
About · Data & methodology ·
Privacy · Contact