Clinical lectures on the principles and practice of medicine . Under this head may be classed the promi-nent growths in someforms of ichthyosis; tu-mors resembling warts, butso indurated as to resemblehorn, and true horny ex-crescences growing from thesurface. In some forms of ich-thyosis, the growths standout as distinct spines, broadon the surface, narrow attheir insertions, like col-umns of many sides, accu-rately fitting to their neigh-bors. Homy tumors occa-sionally occur, varying insize from a bean, or extend-ing over a space the size ofhalf-a-crown. Many casesare on record of true hornh
Clinical lectures on the principles and practice of medicine . Under this head may be classed the promi-nent growths in someforms of ichthyosis; tu-mors resembling warts, butso indurated as to resemblehorn, and true horny ex-crescences growing from thesurface. In some forms of ich-thyosis, the growths standout as distinct spines, broadon the surface, narrow attheir insertions, like col-umns of many sides, accu-rately fitting to their neigh-bors. Homy tumors occa-sionally occur, varying insize from a bean, or extend-ing over a space the size ofhalf-a-crown. Many casesare on record of true hornhaving grown from the sur-face, especially from thehead, originating in somesebaceous follicle. Theyhave grown several incheslong, as seen in Fig. making asection of theseproductions, they are foundto be identical with thems- -il- structure of true horn in the lower animals, or with that of the ? nails on the hands and toes. They consist of condensed epidermic scales, which on the addition of acetic acid, assume all the characters of such Vascular Growths.—Angionoma. Vascular growths are formed by an increase in the dimensions ornumber of the arterial, capillary, or venous vessels. Several growthsalready described, as well as such as are of a cancerous nature, are veryvascular;—indeed, so much so, that in some cases the slightest touchcauses alarming haemorrhage, as in the case of so-called uterine polvpi,and fungus haematodes. No doubt there is considerable increase of vas- Fig. 241. From an old preparation in the Edinburgh University Museum. Themedal attached to it bears the following quaint inscription:— This horn was cutby Arthur Semple, Chirurgeon, out of the head of Elizabeth Low, being three inchesabove the right ear, before these witnesses, Andrew Temple, Thomas Burne, GeorgeSmith, John Smytone, and James Tweedie, the 14th of May, 1671.—It was growingseven years ; her age 50 years. Natural size. VASCULAR GROWTHS. 217 eular growth in such tumor
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmedicine, bookyear187
