The objective of this work was to estimate direct public spending on COPD and lung, bronchial and tracheal cancer in Altamira city, in the Brazilian Amazon region, between the years 2017 to 2020. This is a cross-sectional study based on official and secondary data from the Information System Hospitals of the Unified Health System (SIH/SUS), provided by the Informatics Department of the Unified Health System (DA...