Lung cancer symptoms - fluid accumulation
Lung cancer can cause fluid to collect in and around the lungs (pleural effustion) and beyond to the abdomen (ascitis) or heart (pericardial effusion).
Learn about fluid accumulation
Fluid around the lungs or malignant pleural effusion (ASCO's Cancer.net)
Fluid in the abdomen or ascitis (ASCO'S Cancer.net)
Malignant pericardial effusion (National Cancer Institute)
Edema or fluid retention (ASCO's Cancer.net)