PURPOSE: To evaluate imaging characteristics of metastatic renal tumors in CT and US. MATERIALS AND METHODS: Renal metastases were diagnosed in 25 patients by surgery (n=2), US-guided biopsy (n=15), or follow-up CT (n=8). The primary tumors metastasized to kidney were lung cancer (n=11), adenold cystic carcinoma (n=3), stomach cancer (n=2), and choriocarcinoma (n=2). Twelve cases invloved one kidney and 13 invloved both kidneys. CT was performed in all 25 patients while US was done in 14. We analysed CT findings in respect to number, size, shape, exophytic degree, margin, and degree and homogeneity of the contrast enhancement of the lesion; US findings in regand to echogenicity and homogeneity of the lesion. RESULTS: The average number of the lesions per patient seen on CT was three;average diameter of the lesion was 3.6cm; and 75% (57/76) of all tumors had exophytic degree of 0%. The characteristic CT findings of metastatic renal tumors were round shape (52/76), ill-defined margin (54/76), and poor (76/76) and inhomogeneous (45/76) contrast enhancement. The echogenicity of the tumors were homogeneous (11/18) and isoechoic (10/18) on US. CONCLUSION: Metastatic renal tumors had a tendency of multiple, small, ill-marginated, and less-exophytic nature on CT, and homogeneous, isoechoic appearance on US. The familiarity with the constellation of CT and US findings of renal metastasis described may be helpful in making a correct diagnosis.
Biopsy ; Choriocarcinoma ; Diagnosis ; Female ; Follow-Up Studies ; Humans ; Kidney ; Lung Neoplasms ; Neoplasm Metastasis* ; Pregnancy ; Recognition (Psychology) ; Stomach Neoplasms

70 cases of gastric mucosal erosions were diagnosed by double contrast upper gastrointestinal examinations andendoscopic findings. Analyzing the radiographic findings of these 70 cases of gastric mucosal erosions, thefollowing results were obtained. 1. Among the total 70 cases, 65 cases were typical varioliform erosions showingcentral depressions and surrounding mucosal elevations. Remaining 5 cases were erosions of acute phase havingmultiple irregular depressions without surrounding elevations. 2. The gastric antrum was involved alone or in partin all cases. Duodenal bulb was involved with gastric antrum in 4 cases. 3. The majority of the cases had multipleerosions. There were only 2 cases of single erosion. 4. In 65 cases of varioliform erosions; 1) The diameter ofthe surrounding elevations varied from 3 to 20mm with the majority (47 cases)between 6 and 10mm. 2) In geneal, thesurrounding elevation swith sharp margin on double contrast films were also clearly demonstrated on compressionfilms but those with faint margin were not. 3) The sized of the central barium collections varied from pinpoint to10mm with the majority under 5mm. The shape of the central barium collections in majority of the cases were roundwith a few cases of linear, triangular or star-shape. 5. In 5 cases of acute phase erosions; 1) All the 5 caseswere females. 2) On double contrast radiography, all the cases showed multiple irregular depressed lesions withoutsurrounding elevations. 3) 1 case had the history of hematemesis. 4) In 1 case, there was marked radiologicalimprovement on follow-up study of 2 months interval. 6. In 23 cases, there were coexistent diseases with gastricmucosal erosions. These were 13 cases of duodenal bulb ulcers, 7 cases of benign gastric ulcers and 3 others.
Barium ; Depression ; Female ; Follow-Up Studies ; Hematemesis ; Humans ; Pyloric Antrum ; Radiography ; Stomach Ulcer ; Ulcer

The experimental study was performed to evaluate the microvascular changes in post irradiation injury of small intestine. With a total of 28 rats, 24 rats were irradiated on right upper quadrant of abdomen with a single dose of 2000 rads and each group of 4 rats were followed up in 1,2,4,5,12, and 16 weeks and remaining 4 rats were used for normal control group. Evaluation of the microvascular changes were done by observing both microangiographic and histopathologic findings in groups of each follow-up week. The results were as follows; 1. The main microangiographic findings were stretching and diffuse narrowing of vessels and extravasation of microbarium in post-irradiation 1-4 weeks, and focal narrowing and dilatation, irregular branching pattern and tortuosity of vessesl in in post-irradiation 8-16 weeks. Poor opacification of capillary network was continuously observed in all follow-up period. 2. The degree of vascular tortuosity in microangiography was consistent with the degree of vascular wall thickening in histopathology. 3. It is inferred that results in this experimental study with microangiography can be used as a guide line for further studies of post-irradiation injury of small intestine.
Abdomen ; Animals ; Capillaries ; Dilatation ; Follow-Up Studies ; Intestine, Small ; Radiation Injuries ; Rats

PURPOSE: To evaluate the incidence of GB opacification, seen at CT, by contrast media injected a few hours earlier in adults with normal renal function and to assess the clinical significance of the opacification. MATERIAL AND METHODS: Seventeen patients with normal renal function were included in this study. Contrast enhanced CT scan was performed 4-13 hours after intravenous urography. As a control group, 17 patients in whom contrast media was not used in recent three days were included. The incidence of GB opacification and CT number of the GB were compared between 17 study patients and 17 control patients. RESULT: GB opacification(either homogeneous opacification or layering of contrast media and bile) was seen in 16 of 17 study patients(94%). GB was not opacified in any one of the control group. The mean CT number of GB was 174 HU in study patients, and was 27.3 HU in control patients. CONCLUSION:GB opacification seen at CT several hours after injection of water soluble contrast media seems to be a physiologic phenomenon, and that phenomenon should not be considered as a vicarious excretion due to impaired renal function.
Adult* ; Contrast Media* ; Humans ; Incidence ; Tomography, X-Ray Computed ; Urography

No abstract available.
Myasthenia Gravis*

Adenoid cystic carcinoma of the major salivary gland is a relatively rare tumor which is well known for its high local recurrence rate and frequent distant metastasis. Metastasis of this tumor to kidney has not been reported previously to our knowledge. We report two cases of renal metastasis from adenoid cystic carcinoma of the salivary gland.
Adenoids* ; Carcinoma, Adenoid Cystic* ; Kidney ; Neoplasm Metastasis* ; Recurrence ; Salivary Glands*

PURPOSE: To evaluate US and CT characteristics of small renal cell carcinomas with diameter less than 3cm. MATERIALS AND METHODS: We retrospectively analysed US and CT findings of the small renal cell carcinomas which were surgically confirmed. We analysed echogenicity, peritumoral hypoechoic rim, intratumoral cysts on US. We analysed CT with viewpoints of tumor margin, growth pattern, renal contour change, attenuation on pre- and postcontrast scan, homogeneity, and perirenal changes. RESULTS: The US characteristics of the small renal cell carcinomas were hyperechogenicity(89%), peritumoral hypoechoic rim(66%) and intratumoral cysts(44%). They had relatively well-defined margin(90%), smooth and round contour(90%), endophytic growth pattern(65%), and outward bulging of renal contour(75%) on CT. They had iso- or high attenuation(87%) on precontrast CT, and were relatively homogeneous low-attenuated on postcontrast CT. CONCLUSION: The constellation of US and CT findings may be helpful in the diagnosis and understanding of the internal architecture of the small renal cell carcinomas.
Carcinoma, Renal Cell* ; Diagnosis ; Retrospective Studies

PURPOSE: To evaluate the role of antegrade balloon dilatation and uteteral stenting in benign ureteral strictures. METHODS AND MATERIALS: Percutaneous antegrade balloon dilatation was attempted in 46 patients with benign ureteral strictures. The underlying causes of the strictures were urinary tract tuberculosis in 20 patients, congenital ureteropelvic junction obstruction in eight, ureteroneocystostomy or ureteroileostomy state in five, postoperative or post-extracorporeal shock wave lithotripsy state for ureteral calculi in eight, ureteral injury during surgery in four, and retroperitoneal fibrosis in one. RESULTS: Antegrade balloon dilatation was performed with initial technical success in 43 patients but the procedure was aborted in the remaining three with urinary tract tuberculosis due to the failure in passing a guidewire through the stenotic lesions. Intravenous urograms obtained 4-76 months after the procedure showed improvements in 76%(13/17) with urinary tract tuberculosis, in 63%(5/8) with congenital ureteropelvic junction obstruction, in 88%(7/8) with strictures associated with ureteral calculi, and in 100%(4/4) with iatrogenic ureteral injury. The results were relatively poor in strictures of the ureteral anastomosis(1/5) and in ureteralstrictures associated with retroperitoneal fibrosis(0/1). CONCLUSION: Antegrade balloon dilatation of the urinary tract combined with ureteral stenting was an effective technique for the management of the benign ureteral strictures.
Constriction, Pathologic* ; Dilatation* ; Humans ; Lithotripsy ; Retroperitoneal Fibrosis ; Shock ; Stents* ; Tuberculosis ; Ureter* ; Ureteral Calculi ; Urinary Tract

Mixed Mullerian tumors are rate uterine malignancy and occur primarily in postmenopausal women. We have experienced three case of pathologically proven mixed Mullerian tumor. Two cases had prior history of pelvic irradiation for uterine cervical carcinoma. We suggest that mixed Mullerian tumor should be suspected when an enlarged uterus with polypoid masses in the uterine cavity are initially observed in postmenopausal women who had history of pelvic irradiation.
Female ; Humans ; Magnetic Resonance Imaging* ; Uterus

Mixed Mullerian tumors are rate uterine malignancy and occur primarily in postmenopausal women. We have experienced three case of pathologically proven mixed Mullerian tumor. Two cases had prior history of pelvic irradiation for uterine cervical carcinoma. We suggest that mixed Mullerian tumor should be suspected when an enlarged uterus with polypoid masses in the uterine cavity are initially observed in postmenopausal women who had history of pelvic irradiation.
Female ; Humans ; Magnetic Resonance Imaging* ; Uterus