[Local characteristics of sinuses of the mesenteric lymph nodes in the adult].

A morphometric investigation of the sinuses has been performed using longitudinal, stained after van Gieson sections of peripheral and central mesenteric lymph nodes taken from 27 corpses of mature men. All the sinuses in the human mesenteric lymph nodes have a specific form and size which are defined by certain peculiarities in the structure of their capsule and trabecules, by topography of cortical and medullary substance. In the marginal sinus, owing to certain topographo-anatomical and morphometric differences, the cortical and medullary portions are separated, the width of the lumen in the latter being greater than that of the cortical. In the medullary substance, intermedullary and trabecular sinuses are traced, their terminal parts being wider than the initial ones. The peripheral mesenteric lymph nodes (the nodes of the 1st step of the lymph flow) are characterized by presence of a complex labyrinth of medullary intermediate sinuses limited predominantly with medullary cords. In the central mesenteric lymph nodes (the nodes of the 2d--3d step of the lymph flow) the sinuses are situated closer to the trabecules (chylaric) and to the chylaric thickening, characterized with more direct connections with the marginal and portal sinuses.