. Radiography, x-ray therapeutics and radium therapy . Ultimately it was passed into the bladder and voided in theurine. This is by no means an uncommon occurrence, and should be keptwell in mind when we have to consider the question of operative interferencein a case where the presence of a stone has been demonstrated in the courseof the ureter. If thesymptoms are notacute, all smallureteric calculi shouldbe given every facilityto pass into thebladder before aserious operation iscontemplated. What might betermed a migratorystone in the ureteris well illustratedby a case occurringin the practi
. Radiography, x-ray therapeutics and radium therapy . Ultimately it was passed into the bladder and voided in theurine. This is by no means an uncommon occurrence, and should be keptwell in mind when we have to consider the question of operative interferencein a case where the presence of a stone has been demonstrated in the courseof the ureter. If thesymptoms are notacute, all smallureteric calculi shouldbe given every facilityto pass into thebladder before aserious operation iscontemplated. What might betermed a migratorystone in the ureteris well illustratedby a case occurringin the practice of Holland ofLiverpool, where was foundto occupy a positionin the lower ureterand pelvis of thekidney the operation it was found that the ureter was dilated to an enormousextent. Urinary Calculi.—3. In the Bladder.—A vesical calculus may beformed of almost any of the urinary deposits met with, and each has its owncharacteristics. (a) The uric-acid calculus is usually oval in shape and flattened, and of. Fig. 184.—Large stone iu the variations in the density of the stone are well shown. 244 EADIOGEAPHY variable density. On section it is distinctly laminated with a smooth,or slightly undular surface of a brownish colour. It may be crusted withphosphatic material. A pure uric-acid calculus gives a faint shadow radio-graphically. (6) The urate of ammonium calculus is of a similar structure, but oflighter colour. (c) Oxalate of lime calculus is a rough irregular body, not infrequentlytuberculated or even spiculated. It is extremely hard and dense, of areddish-brown colour, or sometimes black, owing to admixture with is rarely of great size, on account of the irritation caused by its presenceand its slowness of growth. (d) A pure phosphatic calculus is somewhat rare, but any stone or foreignbody is certain to become coated with a phosphatic deposit when chroniccystitis has resulted in alkaline decomposition of the
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