The theory and classification of inflammations of the skin / by A. B. Buchanan, M.D.

  • Buchanan, Andrew Bogle.
Date:
1863
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Licence: Public Domain Mark

Credit: The theory and classification of inflammations of the skin / by A. B. Buchanan, M.D. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    siuface of the skin, often agglutinated by a viscid secretion, but these are never well-formed crusts, nor is there ever any chronic thickening of the corium due to epidermic infiltration. A further test of the naturalness of the group is furnished by the tendency of many of its genera to pass, in particular forms, into particular forms of collateral genera. Thus we see the connexion between erythema and herpes simplex, between hei-pes zoster and urticaria, between erythema aiid dermatitis, between erysipelas and pemphigus vul- garis, and between pityriasis rubra and pemphigus foliaceus. At the same time, there are also transitional forms tending to connect erythema with eczema, as seen in erythema strophulus and in herpes simplex. In like manner, dermatitis is closely related to the phlegmonous inflammations, so that Hebra puts them into one class, disting-uishing the one as dermatitis eiytkematosa, and the other as dermatitis phlegmonosa. Reder also enumerates, and per- haps with justice, erythema nodosum (dermatitis contusiformis) among the phlegmonous inflammations. Sczematous Infammations {Selective). ( erythematodes. Ist Grade, Dry..-^ papulatum {^'^'^'^ '''i'^' r vesiculare. 2d Grade J rubrum. (sparsa. {Eg. humidum). ] ]^ustvLiosnTa=Impetigo ...■< Jiguraia. [ rimosum ( pilaris. (-r • 1 f exudativiis. M Grade,-Dy:jJ \ruher. (^Ec. squamosum. 2. Acne. 3. Ecthyma. 4. Psoriasis {punctata, gidtata, nummularis, circinata [Lep-a], gyrata, confluens). I would first observe that I have marked the position which acne ought to occupy, if it should seem to any one more natural to take it up in connexion with the inflammations of the skin, rather than as one of the diseases of its glandular apparatus. It seems to me that eczema, acne, and ecthyma form so many genera of an extremely natural grovip. Psoriasis, on the other hand, is a disease per se, spreading according to laws of its own, affecting, almost always, robust and otherwise healthy persons, and quite unlike any other cutaneous disease. The common characters of the group of eczematous inflammations are these. The eruptive lesions are concentrated at special anatomi- cal centres: the orihces of hair follicles, the mouths of glands, or at any rate, at particular points probably determined by extra vascu- larity. The deeper epidermic layers are liable to become thickened by a process of infiltration with plastic liquids. When fluid effusion takes place, it is not merely serous, but plastic or ]5urulcnt; and contributes to a true crust formation on the surface of the skin. I N J o ^
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