A pediatric osteosarcoma with pulmonary metastasis and malignant pleural effusion. Osteosarcoma with pulmonary metastasis and malignant pleural effusion.
[ncbi.nlm.nih.gov]
When these cancer cells cause fluid to build up in these areas, it is called malignant pleural effusion and malignant ascites.
[cancer.net]
Malignant pleural effusions, observed in up to 42% of cases, most commonly arise from primary tumors of the lungs, the breast and the ovaries, and from lymphoma.
[ncbi.nlm.nih.gov]