A member from Arlington, United States, suffered from AMS and suspected HAPE while on the Guacanos route of Aconcagua, Argentina. Symptoms included shortness of breath and dangerously low oxygen saturation despite medication. A helicopter evacuation was approved, and the member was transported from Plaza Argentina to Mendoza for hospital treatment. After overnight monitoring, the condition improved, with minor congestion and resolved headaches, allowing for discharge and independent recovery.