It these latter affections which, from their frequent occurrence, chiefly claim our attention. The only representative the idiopathic class, according Kohn, that mysterious affection variously called, area celsi, alopecia circumscripta, porrigo decalvans, and him alopecia areata. This characterized, as well known, the occurrence bald spots, more or less circular in shape, which have generally attained some considerable size before umi dissertation publishing essay writing help for high school students they are discovered. The skin such portions the scalp looks rather paler than normal, shows no trace former growth hair, smooth, and perhaps either slightly elevated and elastic, or else depressed and firmer than the surrounding parts. It may, however, with the exception this loss hair, and consequent retrocession the hair follicles, appear natural. It affects, too, as known, the beard and eyebrows, and may extend the other hairy portions the body. There has for a long time been a dispute as whether this affection parasitic origin or not, many recent they fail find the fungus in the cases examined, and this latter opinion are Hebra and Kohn. On the other hand, such observers as Bazin and Hardy state that they have seen such a fungus as Oruby described, and Fox, Hutchinson and Anderson consider parasitic, and such statements cannot set aside, as our authors would have them, the absurd ground that these gentlemen have confounded ordinary ringworm the scalp with cases this affection.
A single positive observation theirs outweighs course a thousand negative attempts their opponents, and must accepted as demonstrating that in certain and exceptional cases, not distinguished clinically from the best online essay writing service majority, appearances in every way resembling ordinary alopecia areata are caused or accompanied the growth a peculiar frmgus, and this plant apparently the same in all the cases in which has been seen these various observers.
To these I able add an unmistakable instance the best essay writers the disease in which the parasitic element was unmistakably present, the only one in some twenty cases which have been under observation, although they were not all carefully examined the microscope, and some them were far advanced as present but few hairs remaining for examination.
It seems fairly demonstrated, then, that there a parasitic affection the scalp, which differs not at all in appearance and course from ordinary non-parasitic alopecia areata, just as a parasitic sycosis exists in spite a similar argument against its existence from the Vienna school.
The statement Rindfleisch, recently made in the Archiv fiir Dermatologie, that the disease caused an anatomical change in the structure the hair, seems set aside the observation the author, that has seen the same appearances occurring quite as frequently in the hairs persons not affected with this disease. Thus far no appearances peculiar the non-parasitic form this affection have been observed, nothing, in fact, explain its nature, that Kohn obliged fall back upon the theory frmctional nervous derangement for a cause. To this no means a satisfactory explanation all its phenomena, as the other tissues and functions the skin are in no way altered, and its gradual spread from a single central point in many cases over large surfaces remote from each other and supplied distinct nerves, opposed such a theory.
Its simultaneous occurreifce in several members the same family, and in persons robust health, too, does not lend support.
In the way treatment nothing new proposed. Under symptomatic alopecia, among other casual affections which may give rise defluvium capillorum, find discussed at length that condition, the most frequent all causes premature baldness, alopecia furfuracea, or seborrhoea. To return the hypertrophies. Hebra describes briefly under the general title Keratoses, such affections as callosities, corns, cutaneous horns, warts and ichthyosis and Kohn follows with valuable chapters hypertrophy the nails, scleroderma, elephantiasis arabum, the extremities, genitals, and the congenital form, elephantiasis tcleangiectodes, a name hitherto applied all sorts moist excrescences various shapes upon the skin, both syphilitic and nonsyphilitic forms, for the latter which Under atrophies, in addition the affections already mentioned, Kohn describes as xeroderma a rare and parchment-like condition the skin, not confounded with the variety ichthyosis which the same name has been applied Wilson the multiform degeneration the tissues the skin called senile atrophy and the stria maculas atrophicse, once regarded as proof pregnancy, even upon the skin The impossibility continuing the consideration these very interesting and various affections in any proper manner within the limits an article like the present, prevents anything beyond this simple enumeration the contents the remainder the volume. Enough has been said show that treats many the most obscure forms cutaneous disease, and in a manner with few exceptions worthy the great fame the author and the bright Pathological perforations in the membrana tympani show great diversity behavior. The very great prevalence this aflfbction and the frequent deformity which buy research papers online cheap gives rise, have led translate the chapter relating with its valuable details treatment, rather usa essay writing services than attempt an abstract in this arUclo. It will appear in a ftitore number Sometimes extensive destruction may restored the formation cicatricial tissue, while in other cases the healing process small perforations totally arrested, their margins having been covers over connective tissue. Cicatrization perforations begins the exudation plastic elements their margins, which Experience shows how difficult determine under what conditions perforations are likely close. Artificial openings in the membrana tympani close almost invariably. The size a perforation not depended upon.