Japanese Journal of Veterinary Research;第1巻 第4號

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赤色リンパ節の研究 II. : 所謂周縁洞の組織學的觀察

工藤, 規雄

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Abstract

In this paper, there are described some microscopical observations on the peripheral sinus of the red lymphonodus in goats. Eight hundred and seventy-seven nodi were found in several regions of 27 goats, and used in this examination. This research work was performed by the writer having in mind the following conception : "the peripheral sinuses of the red lymphonodi are not to be regarded as modifications of the ordinary lymphatic sinuses, but as structures sui generis." Most of the following results which were obtained belong to his new findings, while some of them connect with earlier known facts which have not very sufficiently explained by previous observers, as the present author emphasises here. (1) In the peripheral sinuses of red lymphonodi there were observed 4 different distinctive features of the structures. As feature I, the spongy structure of the peripheral sinus of some red lymphonodus is pointed out. Each chamber of the sponge is completly surrounded by walls, and closed chambers are shown in section. These walls are continuous to the tissue of the capsule consisting of connective tissue and smooth muscle fibres. The spaces of the spongy chambers of this feature are supposed to be continuous with each other and to be developed into some compact tissue such as the capsule tissue (Fig. 1). As feature II attention is directed to the following structure. Here the walls of the sponge do not completely enclose the chambers, so the latter become unclosed chambers in section. Nearer the medullary portion of the nodi the walls of these unclosed spaces become gradually slender inwardly, and show trabecula-like nature, protruding into the sinus cavity. Of course, there are proved connective tissue and smooth muscle fibres in these trabeculas. In this feature the sponge seems to be developed by the repeated branching of trabecula in the sinus cavity (Fig. 2). In feature III the trabecula-like tissue pieces come to be composed of fibrous tissue cells only. Each piece of the trabeculas consists of 2∿3 cells with a few connective tissue fibres. It is supposed that these fibrous tissue pieces are connected to each other by their connecting fibrous process giving spongelike texture to some part of the peripheral sinus (Fig. 3). Practically it does not very distinctly differ from the next feature IV, but it is evidently distinguishable from the latter by the absence of definite argyrophilic fibrils (Fig. 4). Feature IV resembles III, but in this case the intrasinous net work of cells consists of the combination of the protoplasmatic process of each cell giving off fine reticulated fibres, which were found to form a remarkably narrow network of argyrophilic fibrils (Figs. 5,6). These 4 features do not always occur in the same preparate, but often some of them are lacking. In some cases these four different features gradually appear in sequence I, II, III and IV. (2) The author classified the red lymphonodi into 4 types according to the state of appearance of the above described 4 features in the peripheral sinus of each individual nodus. The red lymphonodi of which the peripheral sinuses have feature I in any part were classified as A type (Fig. 7). When the peripheral sinuses of some nodi have not the chamber as feature I in any part, but the bundles beneath capsule as in II feature, the author classified the red lymphonodi as B type (Fig. 8). Some nodi have peripheral sinuses without features I and II in any part of them, but with feature III. So such red lymphonodi were called C type (Fig. 9). The others were indicated as D types having the peripheral sinuses with feature IV alone (Fig. 10). (3) The ratio of appearance of the red lymphonodi with each type of sinus structure decreases from A to B, C and D. (4) There was seen to be a definite relation between the type breadth and quantity of involved erythrocytes of sinus. a) In A, B and C types the ratio of appearance of the red lymphonodi with broad sinus is greater than C

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