Munandar, M.A.R., Kusumastuti, I. , Herlina, L. and Munandar, H.P. 2026. Shoulder Pain as The First Clue: A Case Report of Pancoast Tumor with Early Presentation. Respiratory Science. 6, 2 (Feb. 2026). DOI:https://doi.org/10.36497/respirsci.v6i2.202.