An etiological nosology of diseases of the skin / by Thomas Laycock.
- Thomas Laycock
- Date:
- 1862
Licence: Public Domain Mark
Credit: An etiological nosology of diseases of the skin / by Thomas Laycock. 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.
7/26 page 5
![the existing terms, by grouping those that are synonymous under one term selected from the. rest as most descriptive cither of the appearances, origin, progress, or termination of the disease. Hence terms indicating moi'bid variations in the colour, form, mode of spread on the surface, or extension of the disease, or clearly in- dicating the exciting or predisposing causes, are to be preferred. As to the general or universal diseases, the pathological results of morbid changes may also be named, because these are mainly the sequelae of inflammatory action of various kinds. Thus, in the variolas and varioloids we have circumscribed inflammation, either effusive or suppurative. This part of the terminology of skin diseases should also define, when possible, the particular tissue of the skin involved in the disease—as the papilhe, the epithelium, vascular rete, derma, &c.; and must therefore, to this end, be based upon, and explain, the pathological anatomy of cutaneous diseases Anatomy and Semeiology.—The results of cutaneous inflam- matory action may be classed according as they are Primary or Secondary. To the Primary belong : 1. Redness, or pimply spots. Erythema—macula ; 2. Pimple—papula; 3. Lumps or tubercles— nodus, tuberculum ; 4. Blains—including (a) tetter or vesicle, as in Herpes—resicula; {b) Water blebs or blisters, large vesicles— bulla, ph.hjct(ena, pomphvs; 5. Pustules—(«) vesicular or dracious pustules; (6) Purulent or phlyzacious pustules—Ex. Ecthyma; 6. Boil or carbuncle; 7. Hsemorrhages. To the Secondary results of cutaneous inflammation belong, 1. The production of epithelial scales—Dandriff, dry scale, or squamous inflammation ; 2, Crack or fissure of the derma ; 3. Excoriation of the epiderma; 4. Ulcer; 5. Slough; 6. Crusts or scabs ; 7- Cicatrix; 8. Freckle, stain, or discoloration. These results of inflammatory action are often consecutive in the same case. Psoriasis, for example (a scaly disease) begins with a papula and sometimes ends with a discoloration; a rupious ulcer begins with a vesicle. Hence, in diagnosis from the ])athological anatomy, the primai\v stages of the disease must be determined as well as the terminal. Classification of Cutaneous Inflamm.\tions.—I. Congestive Infiammations of the Skin. In these there is an increased number of red corpuscles circulating or heaped up within the capillaries of the vascular rete of the part affected. It is the first stage of in- flammation of any of the structui'cs of the skin. The characteristic mark is increased redness. 1. Erythema designates the congestive redness which occupies the derma, in homogeneous patches or otherwise, and not limited to or specially involving the papillary layer or the vascular rete of glands. 2. Spotted^ Maculated, or Pimply Injlummation, is (a) congcs- A 2](https://iiif.wellcomecollection.org/image/b21481234_0007.jp2/full/800%2C/0/default.jpg)
