TY - JOUR
T1 - Ureterolithiasis
T2 - Can clinical outcome be predicted with unenhanced helical CT?
AU - Takahashi, Naoki
AU - Kawashima, Akira
AU - Ernst, Randy D.
AU - Boridy, Illya C.
AU - Goldman, Stanford M.
AU - Benson, George S.
AU - Sandler, Carl M.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1998/7
Y1 - 1998/7
N2 - PURPOSE: To evaluate the use of helical computed tomography (CT) without contrast material enhancement for prediction of a favorable outcome in ureterolithiasis. MATERIALS AND METHODS: CT studies were reviewed in 69 patients with a single ureteral stone not located at the ureteropelvic junction. CT findings (tissue rim sign, hydronephrosis, perinephric fat stranding, perinephric fluid collections, and thickening of renal fascia) were graded on a scale of 0-3. Stone diameter and renal parenchymal enlargement were also measured. RESULTS: Twenty-two patients had spontaneous passage, 12 did not respond to conservative treatment, and 35 were lost to follow-up. When the latter 35 patients were excluded, perinephric fat stranding (P = .044) and perinephric fluid collections (P = .021) were graded significantly higher in patients with spontaneous stone passage. Mean stone diameter was significantly larger (P < .001) in patients in whom conservative treatment failed (mean, 7.8 mm) than in patients with spontaneous stone passage (mean, 2.9 mm). The presence of a tissue rim sign and the grade of hydronephrosis, renal fascial thickening, and renal parenchymal enlargement were not significantly different between the two groups. CONCLUSION: In addition to stone size, the degree of perinephric fat stranding and the presence of perinephric fluid collections are useful ancillary signs for help in predicting the likelihood of stone passage.
AB - PURPOSE: To evaluate the use of helical computed tomography (CT) without contrast material enhancement for prediction of a favorable outcome in ureterolithiasis. MATERIALS AND METHODS: CT studies were reviewed in 69 patients with a single ureteral stone not located at the ureteropelvic junction. CT findings (tissue rim sign, hydronephrosis, perinephric fat stranding, perinephric fluid collections, and thickening of renal fascia) were graded on a scale of 0-3. Stone diameter and renal parenchymal enlargement were also measured. RESULTS: Twenty-two patients had spontaneous passage, 12 did not respond to conservative treatment, and 35 were lost to follow-up. When the latter 35 patients were excluded, perinephric fat stranding (P = .044) and perinephric fluid collections (P = .021) were graded significantly higher in patients with spontaneous stone passage. Mean stone diameter was significantly larger (P < .001) in patients in whom conservative treatment failed (mean, 7.8 mm) than in patients with spontaneous stone passage (mean, 2.9 mm). The presence of a tissue rim sign and the grade of hydronephrosis, renal fascial thickening, and renal parenchymal enlargement were not significantly different between the two groups. CONCLUSION: In addition to stone size, the degree of perinephric fat stranding and the presence of perinephric fluid collections are useful ancillary signs for help in predicting the likelihood of stone passage.
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U2 - 10.1148/radiology.208.1.9646798
DO - 10.1148/radiology.208.1.9646798
M3 - Article
C2 - 9646798
AN - SCOPUS:0031926545
SN - 0033-8419
VL - 208
SP - 97
EP - 102
JO - Radiology
JF - Radiology
IS - 1
ER -