Effusions were bloody but non‐coagulating, contained abundant cancer and inflammatory cells, and had low pH and glucose and high protein, VEGF, and lactate dehydrogenase levels, resembling effusions of human advanced MPM (Robinson et al, 2005; Patil et al, 2018) and of C57BL/6 mice injected with KRASG12C‐mutant AE17 mesothelioma cells (Agalioti et al, 2017). Here, VEGFA is linked to mesothelioma.