. The elements of pathological histology with special reference to practical methods . o~ -i Z^- L^^ * .- * *** *K: ritV :%---1p Fio. 44.—Wall of a Dkrmoid Cyst, x 95, (Stained with hfematoxylin and eosin.) a, Stratumcorneum: b, Rete Malpighii; c, Rudimentary sebaceous gland (?); d, Smooth muscular fibres(arrector pili?); e, Tissue like that of the cutis. (c) Cholesteatoma or Pearl Tumour.—This resembles the atheromatain so far as it has a similar structure and frequently also a similar h c. Fig. 45.—Cholestearin Crystals and Cells krom a Choles-teatoma of the Tympanic Cavity. X 240. (Fresh to
. The elements of pathological histology with special reference to practical methods . o~ -i Z^- L^^ * .- * *** *K: ritV :%---1p Fio. 44.—Wall of a Dkrmoid Cyst, x 95, (Stained with hfematoxylin and eosin.) a, Stratumcorneum: b, Rete Malpighii; c, Rudimentary sebaceous gland (?); d, Smooth muscular fibres(arrector pili?); e, Tissue like that of the cutis. (c) Cholesteatoma or Pearl Tumour.—This resembles the atheromatain so far as it has a similar structure and frequently also a similar h c. Fig. 45.—Cholestearin Crystals and Cells krom a Choles-teatoma of the Tympanic Cavity. X 240. (Fresh torn-up pre-paration.) ft, Crystals; b. Nucleated cells; c, Non-nucleatedcells. mode of origin. It, too, consists of a delicate librous membrane, uponwhich first there rests frequently a layer of short cylindrical cells, but 100 TUMOURS OR NEW-FORMATIONS this is succeeded by flat structures resembling horny epidermic cells,which at first are thick and nucleated, but later always become thinnerand lose their nuclei (Fig. 45, & and c). These form concentrically-stratified pearl-like globules, which enclose cholestearin and some-times even little hairs. When the tumour occurs in localities wherethere is no epithelium, as for example in the pia mater or the brain,it must be supposed to have started from misplaced epithelial germs. (d) Cystic Tumours of New Formation, Cystomata.—These invariablystart from glandular tissue, by the development first of a tissueresembling that of adeno
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectpatholo, bookyear1895
