1/15. Intrarenal varix mimicking a cystic renal tumor.BACKGROUND: A case of intrarenal varix in a 60-year-old woman is reported. methods/RESULTS: The preoperative diagnosis was cystic tumor in the central part of the left kidney. Retrospectively, gadolinium-enhanced magnetic resonance (MR) imaging demonstrated a layered gadolinium sign, indicating the vascular nature of the mass. CONCLUSIONS: Our experience shows that urologists should be aware of the possible presence of a renal cystic mass of vascular origin and of the usefulness of gadolinium-enhanced MR examination for making an identification.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
2/15. Pseudocysts of the kidney, with a report of a hemorrhagic pararenal pseudocyst associated with multiple small renal infarcts.A case of a hemorrhagic pararenal pseudocyst associated with med from multiple small emboli is described. The most common cause of pseudocyst formation is trauma. hydronephrosis is almost always associated with urinary pseudocyst formation. Treatment should be directed at relieving urinary obstruction with excision of the cyst wall when renal parenchyma remains. Pararenal lesions of uncertain nature should be explored. biopsy of the base of a hemorrhagic cyst should be considered before nephrectomy is performed.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
3/15. Nephron-sparing surgery for multilocular cyst of the kidney in a child.Multilocular cyst of the kidney is an uncommon benign renal neoplasm. Because of its benign nature, this lesion is best managed by nephron-sparing surgery. This report describes a child who underwent a partial nephrectomy for a multilocular cyst of the kidney. After reviewing other cases, we discuss the clinical characteristics of multilocular cyst of the kidney and emphasize the cystic partially differentiated nephroblastoma as a differential diagnosis.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
4/15. Computed tomography of abdominal mass lesions in children. Initial experience.Use of a Delta scanner has resulted in delineation of neoplastic, obstructive and inflammatory renal diseases, hepatic tumors, and other abdominopelvic mass lesions. Of 47 patients examined, 32 had proved mass lesions. Computed tomography provided unique information about the complete delineation and nature of lesions and detected unrecognized lesions. Technical problems and solutions are discussed.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
5/15. Renal oncocytoma developed in a long-term hemodialysis patient.A case of renal oncocytoma which developed in a 38-year-old Japanese woman after 7 years of maintenance hemodialysis is reported. An encapsulated round tumor with a diameter of about 5 cm was incidentally discovered by abdominal echography. This is the first case of renal oncocytoma found in a long-term hemodialysis patient. Identification and differentiation of this subgroup from renal carcinomas are very important because of its benign nature. Careful clinicopathological investigation of renal tumors should therefore be required in hemodialysis patients.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
6/15. Unilateral renal cystic disease: CT findings.Unilateral renal cystic disease (URCD) is characterized by replacement of most of one kidney by multiple cysts scattered diffusely throughout the parenchyma without the formation of a distinct, encapsulated renal mass. There are no cysts in the opposite kidney or liver. The condition is nonfamilial and does not cause renal functional impairment. We describe the clinical and radiologic findings in two patients with URCD and discuss how the disorder usually can be distinguished from other renal cystic diseases using CT. Absence of a family history of renal cystic disease and the normality of the other kidney help distinguish URCD from autosomal dominant polycystic kidney disease. The diffuse nature of the cysts in URCD and the absence of a distinct encapsulated renal mass help distinguish URCD from cystic renal neoplasms.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
7/15. Renal cell carcinoma presenting as a single large cyst.A large single renal cyst occurring in a 56-year-old man was found to be a cystic renal cell carcinoma on surgical exploration. Various diagnostic tests preoperatively did not reveal the true nature of the cyst.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
8/15. The relationship of computed tomography, gray-scale ultrasonography and radionuclide imaging in the evaluation of hepatic masses.Hepatic scintigraphy, gray-scale ultrasonography, and computed tomography have proven to be useful in the initial detection and evaluation of hepatic masses. These studies appear to be complimentary since each provides information not available from the others. Hepatic scintigraphy is currently the method of choice for the initial evaluation of the liver for mass lesions as it is easily performed, relatively inexpensive, and affords detectability of intrahepatic mass lesions at least as great as that of ultrasonography or computed tomography. When a definite or suspected abnormality is seen by hepatic scintigraphy, computed tomography or ultrasonography may be helpful in providing better anatomic definition or clarification of the nature of the abnormality. The choice between these latter two modalities depends on the type of scanning equipment available and the observer's experience with each method.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
9/15. Multilocular renal cyst. Case report, ultrastructure and review of the literature.Multilocular renal cyst is an uncommon focal, unilateral, cystic, epithelial lesion of uncertain pathogenesis. Because nephroblastomatous foci have been found on microscopic examination of several of the reported cases, some authors have proposed that multilocular cysts are differentiated and cystic forms of Wilms' tumour. This proposition is analysed and it is concluded that three possibly interrelated lesions may be defined: (1) Wilms' tumours showing cystic differentiation. (2) Lesions macroscopically indistinguishable from multilocular cyst containing variably differentiated nephroblastomatous foci. All such cases have been described in infants. (3) Typical multilocular renal cysts, which have described in children and adults. review of the literature shows that several cases have been included in the second category solely because of the presence of small intraseptal tubules. Consequent anomalies of interpretation are highlighted and a further case of multilocular cyst in an adult female is reported in which ultrastructural examination, recorded for the first time, confirms the epithelial nature of the cyst lining cells which resemble simplified renal tubular epithelium.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
10/15. Multilocular renal cysts: radiologic-pathologic correlation.Multilocular renal cyst, a well-encapsulated benign lesion consisting of multiple noncommunicating cysts, is an uncommon entity of uncertain nature. A spectrum of histologic findings and multiple theories of pathogenesis have resulted in numerous names for the lesion, including multilocular cyst, benign cystic nephroma, cystic hamartoma, cystic lymphangioma, cystic wilms tumor, and Perlmann tumor. We believe these names, and others, refer to the same entity, namely multilocular cyst. Radiographically a multicystic renal mass which is often calcified and which may partially protrude into the renal pelvis is seen. Although angiography cannot definitively exclude a malignant tumor, a distinctive sonographic appearance-multiple cystic masses separated by highly echogenic septa-is highly suggestive of multilocular renal cyst. Inclusion of this lesion in the preoperative differential diagnosis of a solitary and presumed malignant renal mass may have significant therapeutic implications.- - - - - - - - - - ranking = 1keywords = nature (Clic here for more details about this article) |
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