Manual of pathological anatomy . generallycylindrical, occasionally branched, or entirelyamorphous. The texture of the calculi may beuniform or varied, in proportion as they con-sist of one substance or of several show no distinct arrangement; somehave an earthy pulverulent fracture, or ast!netc^mfot^ionL ^^^^^^ striated, laminated,_ micaceous texture,spissated and altered as is particularly observed in calculi consistingbne cemented by mu- ^f cholesterine. Gall-stones are not of anycus. ( , , p • i , ?^ork.) great degree oi consistence, they may some- times be compr
Manual of pathological anatomy . generallycylindrical, occasionally branched, or entirelyamorphous. The texture of the calculi may beuniform or varied, in proportion as they con-sist of one substance or of several show no distinct arrangement; somehave an earthy pulverulent fracture, or ast!netc^mfot^ionL ^^^^^^ striated, laminated,_ micaceous texture,spissated and altered as is particularly observed in calculi consistingbne cemented by mu- ^f cholesterine. Gall-stones are not of anycus. ( , , p • i , ?^ork.) great degree oi consistence, they may some- times be compressed easily between thefingers: they are rather light, but not so much so as to float inwater. Their colour varies from a milky white to various shadesof green, yellow, or brown: internally they often present analternation of difierent coloured laminae. They may be said toconsist generally of cholesterine, mingled with a combination ofpigment and lime in various proportions. Large gall-stones,* Rokitansky, vol. ii. p. BILIARY CALCULI. 64 C-^- [Z witii the exception of tlieir nuclei, consist almost entirely ofcholesterine, and are therefore whitish and crystalline, theirsectional surface presenting a number of striae radiating from thecentre. Small gall-stones, resembling grains of black pepper ofan irregular tuberculated form and almost black colour, areoccasionally found : they consist almost entirely of pigment andearthy matter, the carbonate and phosphateof lime. Cholesterine generally forms the ^lo. 147. principal mass of biliary calculi; it oftenalternates with layers of pigment, and al-most always itself surrounds a nucleus of thesame matter. Some are composed chiefly ofcarbonate of lime. The secretion of aFig. 146. large quantity of cho- ^^ lesterine does not seemj to be the essential and] adequate circumstance,X for the formation ofgall-stones: the gall-bladder sometimes con-tains mucus loadedwith sparkling tabletsof this substance, with-out any trace of calcul
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectanatomy, booksubjectp
