Pyelography (pyelo-ureterography) a study of the normal and pathologic anatomy of the renal pelvis and ureter . arenal. The outline of the tumor-mass may be situated on a linewith the kidney, and the pelvic outline then appears to bewithin it. If the outline of the renal pelvis is normal, theprobability of the surrounding tumor being of renal originwould be slight. Confusion might arise in interpretationwhen an unusually small pelvis or one with anomalousbranching and arrangement of calyces lies in the center of ashadow of a possible renal tumor. In Fig. 261 a distendedgall-bladder cast a shad
Pyelography (pyelo-ureterography) a study of the normal and pathologic anatomy of the renal pelvis and ureter . arenal. The outline of the tumor-mass may be situated on a linewith the kidney, and the pelvic outline then appears to bewithin it. If the outline of the renal pelvis is normal, theprobability of the surrounding tumor being of renal originwould be slight. Confusion might arise in interpretationwhen an unusually small pelvis or one with anomalousbranching and arrangement of calyces lies in the center of ashadow of a possible renal tumor. In Fig. 261 a distendedgall-bladder cast a shadow simulating that of a possiblerenal tumor. In the center of this shadow is seen a narrow 278 PYELOGEAPHY streak, which might easily be mistaken for a deformed renalpelvis. In this case, however, it represents a small pelvis ina state of marked contraction as a result of of the pelvic outline may be caused bypressure from extrarenal tumor. As a rule, it is more mod-erate in degree than that caused by renal tumor. Retro-peritoneal tumor will probably cause the greatest degree of. Fig. 263.—Extrarenal tumor. change in position. Displacement of the upper ureterwill usually be slight, even though the position of the kid-ney is changed. Although pressure by extrarenal tumor willnot often cause much change in the outline of the pelvis,occasionally it may flatten it to a moderate degree. POLYCYSTIC KIDNEYAbnormality in the pelvic outline accompanying poly-cystic kidney will not be apparent in the pyelogram as fre- RENAL TUMOR 279 quently as with renal neoplasm. It was present in but 12of the 21 cases of polycystic kidney where a pyelogram wasmade. The changes in the outline of the renal pelvis whichmay occur with polycystic kidney are as follows: (1) Short-ening or obliteration of one or more of the calyces, givingthe pelvic outline an oval or irregularly squared contour;(2) broad, irregular retraction of the calyces; (3) change in
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectkidneys, bookyear1915
