TNF and rheumatoid arthritis: To identify the effector cells that control lymphatic vessel contractions efferent to inflamed joints in RA, we performed exploratory whole mount immunofluorescent microscopy (WMIFM) on popliteal lymphatic vessels (PLVs) from tumor necrosis factor-transgenic (TNF-tg) mice with inflammatory-erosive arthritis (25) and their wild-type (WT) littermates.