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Related post: BY LOUIS A. DUHRING, M.D.. niOFKSaOR OF DERMATOLOGY IN THB UNlVBItSITY. (Rq;x>rted by Henry Wile, M.D.) LECTURE VL â²TROPHIES ; ALBINISM ; VITILIGO ; CANITIES ; ATROPHIA CUTIS ; STRIiE ET MACULiE ATROPHICiE ; ALOPECIA ; ALOPECIA AREATA; NEOPLASBLATA ; KELOID; MOLLUSCUM FIBROSUM; XANTHOMA; RHI- NOSCLEROMA ; LUPUS ERYTHEMATOSUS ; LUPUS VULGARIS ; SCROFULODERMA. Atrophies are characterized by diminution or de- generation of the elements of the skin. The process may be a simple atrophy, as of pigment in canities, or an atrophy and a hypertrophy combined, as in vitiligo, or, still further, a degenerative atrophy of the skin and subcutaneous connective tissue, as in morphoea. The pigment, skin proper, subcutaneous connective tissue, hair and nail, may all suffer from atrophy. Albinism is a congenital absence of pigment, either partial or universal, of the skin, hair, iris and choroid coat The hair is usually white or yellowish and silky. The persons thus affected are called Albinos, The con- dition occurs among all races, o( the north as well as of the south, and constitutes a curious anomaly. Partial albinism sometimes occurs especially in negroes, who are spoken of as " pied *' or " piebald.** Interesting cases of albinism were those known as the Cape May Al- binos, where the parents were negroes having six chil- dren, three of whom were Albinos and three were black. Vitiligo is an acquired disease, coming on at any age after birth, and is characterized by defined, rounded, ovoid or irregularly shaped patches of whitened skin surrounded by a variable amount of yellowish or brownish pigmentation. It usually begins in one or several places, which are pinkish or whitish, and surrounded by a brownish areola. These spots vary in size from a coin to the palm of the hand, and have a tendency to coalesce, forming larger patches. It is an atrophy of pigment surrounded by a hypertrophy of pigment, or a diminution of pigment surrounded by an excessive amount. The regions most commonly affected are the face, backs of the hands, and the trunk. When marked on the trunk it is not so apt to attack the hands or face. The course is, as a rule, slow, extending over years. The disfigurement is marked if occurring about the face or hands. There are no subjective symptoms, nor is there any disturbance of the general health. The dis- ease is under the influence of the nervous system. ' It is to be distinguished from chloasma in that the latter affection consists of yellowish or brownish spots without whiteness ; also from tinea versicolor, in which there is more or less furfuraceous scaling, the scales containing a fungus. In the way of treatment, much can sometimes be done. Arsenic used judiciously, in small doses, for a period of months or years, is in some cases followed by marked improvement. Local treat- ment is of no avail. The prognosis should always be guarded, as the disease may last a lifetime. Canities, or graying of the hair, may be either pre- mature or due to old age. It may be partial, occiuring in streaks or locks, or it may be universal. The color is variable, sometimes being one shade, sometimes two shades, as in Mr. Wilson's case, in which the hairs in their entire length presented alternate brown and white markings, the latter marking being supposed to be due to the presence of air globules. The hair may also change color, as a yellowish shade may turn into a black, or a brown Lady Era Tablets into a red. Changes may also occur afler severe illness, as after scarlet fever, brown hair being replaced by white. As a rule, time is required for alteration of color, but the question has often arisen as to whether a change could take place Buy Lady Era suddenly, and this question may be answered in the affirmative. Under nervous shock, or strong emotional influence, sudden graying of the hair may take place. Some authorities, as Wilson, explain the phenomenon by the presence of air bubbles in the hairs. Atrophia cutis, or atrophy of the skin proper, is by no means common. In simple atrophy, where there is a diminution of the cutaneous tissue-elements, the skin presents a thin, dry, shrivelled appearance, and in de- generative atrophy, where there is structural change without loss of substance, the skin is somewhat hardened, and presents a waxy, fatty appearance. It may occur in streaks, spots or patches, or it may follow other pro- cesses, as lupus erythematosus, syphilis, seborrhoea and tinea favosa. Glossy skin is a condition due to impaired nutrition occurring about the extremities, especially the fingers, consisting of pinkish, reddish, smooth, shining lesions, like chilblains. General idiopathic atrophy comprises such cases as have been described by Wilson, Hebra, Hutchinson, Taylor and others, and known under the name of *' xeroderma of Hebra," or " parch- ment skin.** The condition is allied to morphoea, and the lesions exhibit a tendency to develop into epithe- lioma. They are disseminated, and consist first of a congeries of bloodvessels, accompanied by pin-head to split-pea-sized telangiectases and excessive pigmenta- tion. STRiiE ET MACULiE ATROPHiCiE may be either idio- pathic or symptomatic. The former manifest them- selves as lines, one or two inches in length, or as pin- head to finger-nail-sized, round or oval spots, present- ing a smooth, shining surface. These are seen most frequently about the pelvis and on the flexor surfaces. The latter consist of those atrophic lesions brought about by overdistention of the skin, as seen in pregnancy and ascites. lyo Related links: Blopress Mg, Order Promethazine Online, Nelfinavir Viracept, Differin Buy, Avapro Discount Card, Repaglinide Tablets, cost 5 mg abilify, Chlorpromazine Hydrochloride, retin a generic form, lisinopril hctz 20