File:A practical treatise on diseases of the skin, for the use of students and practitioners (1897) (14784191485).jpg

Identifier: practicaltreati00hyd (find matches)
Title: A practical treatise on diseases of the skin, for the use of students and practitioners
Year: 1897 (1890s)
Authors: Hyde, James Nevins, 1840-1910 Montgomery, Frank Hugh, 1862- joint author
Subjects: Skin
Publisher: Philadelphia, New York, Lea brothers & co.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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n the following order,the scalp, forehead, temples, nose, lower extremities, male genitals,and trunk. Horns are named from their resemblance to the similarappendages in horned cattle, but they widely differ from cattle-horns,which are always implanted upon osseous tissue. They are formedof dense and massed columns of epithelia, often resting upon some-what prolonged papilla?. Occasionally, on section, they exhibit the HYPER TR OPHIES. 437 concentric arrangement of the epithelia seen in corns, but, unlikethe latter, have reentrant basal depressions into which the papillsebelow penetrate. At times they are implanted in a dilated follicle, inwhich case the glandular elements participate in their formation. Attimes, also, they represent a corneous transformation of the epitheliawhich constitute warts. They are seen in all colors, but are oftenbetween a yellowish-brown and a brownish-black, with a fissured or awrinkled or longitudinally grooved exterior, like rough bark (Fig. 51). Fig. 52.
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Varieties of cutaneous horns. They may be painless, or, like other keratoses, become the seat of in-flammation in various grades. They may be short or several inchesin length (Fig. 52). The largest specimen ever under the authorsobservation was seen by him in France, on the forehead of a man,where it had existed for fifteen years. It measured three inches inlength. They may be shed spontaneously, never to return, or mayshortly reappear. They occasionally develop into epitheliomata, as hasoccurred once under the authors observation, in a gentleman over 438 DISEASES OF THE SKIN. sixty years of age, whose epithelioma developed from a horn on thedorsum of the right hand, projecting about three-fourths of an inch. At the meeting, in 1887, of the American Association of Genito-urinary Surgeons, Brinton,1 of Philadelphia, exhibited an anteriorlycurved horn one and seven-eighths inches long and three-eighths of aninch in circumference, removed by him from the glans penis of anelderly patient,

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