Practical pathology; a manual for students and practitioners . artsof the intima are very delicate. The valves of the veins appear to bemerely folds of the intima, in which a portion of the muscular coat isinvaginated. In all Vessels numerous lymph spaces lined with endothelium arefound in the adventitia, and, in the larger vessels, tubular lymphaticsin the same position. Lymph sj)aces between the bundles of musculartissue are also met with, probably associated with the vasa vasorum ;these communicate with the lymph spaces of the adventitia. 332 BLOOD VESSELS Hyaline Degeneration 269, During t
Practical pathology; a manual for students and practitioners . artsof the intima are very delicate. The valves of the veins appear to bemerely folds of the intima, in which a portion of the muscular coat isinvaginated. In all Vessels numerous lymph spaces lined with endothelium arefound in the adventitia, and, in the larger vessels, tubular lymphaticsin the same position. Lymph sj)aces between the bundles of musculartissue are also met with, probably associated with the vasa vasorum ;these communicate with the lymph spaces of the adventitia. 332 BLOOD VESSELS Hyaline Degeneration 269, During the course of certain specific infective fevers, typhoidfever, scarlatina, and septiccemia a pecuUar hyaUne degeneration of the corneal coat lying between the endothelial lining of the artery andthe internal elastic lamina is met with. This condition has beencarefully described by both Klein and Greenfield as occurring in thearterioles of the kidney during the course of acute inflammations ofthat organ, and by others in the arterioles of the spleen during the. R. A?. Fig. 8i.—Section of small branch of splenic artery undergoinghyaline degeneration. Stained with hajmatoxylin, rubin, and ) a. Adenoid tissue of Malpighian Endothelial lining of Swollen and hyaline tunica Tunica media or muscular coat of vessel. s. Splenic sinuses—arterial. course of the above diseases. To the naked eye there is little to callspecial attention to this condition except that in both kidney andspleen there is evidence of acute inflammation which in the spleentakes the form of acute congestion of the pulp tissue and an abnormalprominence of the greyish Malpighian bodies. Harden (§ 56, 58, or63), cut (§ 82 or 94 et seq.), and stain (§ 147 or 148). ( X 50).—The pulp sinuses are larger than normal, and are distendedwith blood. The sections of the nodes of perivascular adenoid tissueknown as Malpighian corpuscles stand out very distinctly from the HYALI
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