The expression of VAP-1 in lymphoid organs during the ontogeny in humans. Representative immunohistochemical stainings of thymus (black arrow indicates vessel; C, cortex; M, medulla), spleen (black arrow, vessel; arrowhead, central arteriole; WP, white pulp) and PLN (black arrow, venule; white arrow, high endothelial venule) are shown. The gestational age (weeks, except the right-hand panel of a spleen that is 1.5 years) is shown in the top right corner. Scale bar indicates 50 μm. Objective magnification for all images, 20×.