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Child with HAPE tongue (local desquamation with irregularly distributed bright red areas) at 3500 m (4)

Before treatment (top): oxygen is being delivered by nasal cannula. After treatment (bottom): the lingual abnormalities have resolved, and the child no longer required supplemental oxygen. HAPE: high-altitude pulmonary edema. (Source: Zubieta-Calleja G, Zubieta-DeUrioste N. The oxygen transport triad in high-altitude pulmonary edema: a perspective from the high Andes. Int J Environ Res Public Health 2021;18[14]:7619. Creative Commons Attribution [CC BY] License,