The vasculature of the neonatal thymus is VEGF dependent. (A) Tomato lectin staining acquired by confocal microscopy as described in “Methods” showing the vasculature of mice injected with VEGF-Trap (bottom panels) or hFc control (top panels) at 1, 4, 7, and 30 days of age. (B) Quantitation of tomato lectin fluorescence above the control (no lectin staining) threshold. ■ indicates controls; , VEGF-Trap. *P = .001. Error bars represent standard deviation.