An American text-book of genito-urinary diseases, syphilis and diseases of the skin . , con-sisting of cast-off epithelia with nuclei and granules, fat-globules, deln-is, andcholesterin crystals, will collect upon the surface of the skin. According asto whether the cast-off epithelia and epidermal scales or the lat-uloliules pre-dominate the affection will assume either a dry or oily character. Theaccumulated scales will naturally consist of the same ingredients, which maybecome decomposed, and thus give rise to fetid odors. Seborrhea is there- 1102 DISEASES OF THE APPENDAGES OF THE SKIN. fore
An American text-book of genito-urinary diseases, syphilis and diseases of the skin . , con-sisting of cast-off epithelia with nuclei and granules, fat-globules, deln-is, andcholesterin crystals, will collect upon the surface of the skin. According asto whether the cast-off epithelia and epidermal scales or the lat-uloliules pre-dominate the affection will assume either a dry or oily character. Theaccumulated scales will naturally consist of the same ingredients, which maybecome decomposed, and thus give rise to fetid odors. Seborrhea is there- 1102 DISEASES OF THE APPENDAGES OF THE SKIN. fore entirely non-inflammatory in character; if inflammation sets in, it is dueto secondary changes, primarily an irritation. A number of writers, among whom Unna may be named, have of expressed their belief that seborrhea is of parasitic origin. This con-ception is entirely erroneous, as the simple pathology plainly shows. If bac-teria are found at all, as may occasionally be the case, they are only second-ary, and have nothing whatever to do with the cause of the Fig. 269.—Vertical section through the scalp of a new-born child suffering from seborrhcea neona-torum ; magn. 250 diam.: e, epidermis; m, rete mucosum ; s, shaft of hair; ?•, root of hair, cut obliquely;i, inner root-sheath; o, outer root-sheath;/, follicle of hair; g, g, sebaceous glands, with ducts; d, d,derma of the skin; v. veins in the derma. Diagnosis.—In most cases the diagnosis of seborrhea is easy. Sebor-rhea of the scalp may, however, be mistaken for eczema, psoriasis, and ring-worm. It should always be remembered that seborrhea is primarily a non-inflammatory disease, and that if any redness is present at all, it will besecondary and only slight. Squamous eczema of the scalp will never pro-duce such an abundant scaling, nor are the scales as loose and easily detach-able, as in seborrhea. In psoriasis of the scalp the scales are extremely thick,not greasy and glistening, and when det
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Keywords: ., bookcentury1800, bookdecade1890, booksubject, booksubjectsyphilis
