On the lymphatics of the pancreas / by George Hoggan and Frances Elizabeth Hoggan.

  • Hoggan, George
Date:
[1881]
Catalogue details

Licence: Public Domain Mark

Credit: On the lymphatics of the pancreas / by George Hoggan and Frances Elizabeth Hoggan. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    13/24 page 487
    lobule, the axis of both being parallel to each other. Although, however, the tip or point of the cul-de-sac is actually broader than the channel behind it, there is never any attempt to send off small channels such as one might conceive the ultimate lymphatic radicle to resemble. We have already stated that, owing to the protection given by the double endothelial wall of the lymphatic to the mass of the glandular tissue beneath it, the silver solution has not been permitted to permeate the mass at such points, and the excessive exposure to light which we previously urged as a necessity, while it renders the less protected surface of the glandular tissue of a dark brown colour, leaves the places covered by the lymphatics of a light blue tint, due purely to the staining of the logwood fluid. This is so well marked that there is no difficulty in recognising the course and shape of such lymphatics with powers much too low to recognise the crenated endothelium, which is alone the guarantee of a lymphatic. In addition to the light blue images which mark the lym- phatics, many other small light blue spaces may be observed upon the mass of the lobule that might be taken to be points of culs- de-sac of lymphatics penetrating the organ, and as evidence of complete permeation of the lobule by branches of the lymphatic system, such as exist almost unanimously in theory, but never in fact. When such isolated light blue patches are examined by a high power, more than sufficient to show with beautiful clearness the crenated edges of the contiguous lymphatics, it will be observed, in the first place, that such spaces possess no crenated lines which would argue the presence of a lining of lymphatic endothelium. Further examination will show that those spaces represent the crevices between the contiguous ultimate lobules, or even acini, of the gland. When in the living condition the silver solution was momentarily applied to the tissues, these lobules or acini being close together prevented the silver solution from penetrating between them and stain- ing them. The subsequent extended exposure to hsematoxylin allowed, however, that staining fluid to colour all the elements of a light purple tint. When, subsequently, the tissues were dishydrated by alcohol and essential oil a certain amount of contraction took place, more or less, but unequally, in the
    digitised image 1
    digitised image 2
    digitised image 3