“PET-NEGATIVE LUNG ADENOCARCINOMA ARISING WITHIN A BENIGN-APPEARING PULMONARY BULLA: A RARE CASE OF SYNCHRONOUS PRIMARY LUNG CANCERS”. Vietnam Journal of Community Medicine, vol. 67, no. English Version No 1, 2026, June 2026, https://doi.org/10.52163/yhc.v67iE1.5106.