11/2869. Renal cell carcinoma with a fatty component mimicking angiomyolipoma on CT.A very unusual CT appearance of renal cel carcinoma is presented, in which the fatty density mimicked a benign angiomyolipoma.- - - - - - - - - - ranking = 1keywords = cell (Clic here for more details about this article) |
12/2869. Bellini duct (collecting duct) carcinoma of the kidney.carcinoma of the collecting ducts, or Bellini carcinoma, is a rare renal tumour and, unlike most renal cell carcinomas, it derives from distal tubules. It displays highly aggressive behaviour and has a poor prognosis. In this study, the authors present three cases which they observed over the past three years.- - - - - - - - - - ranking = 0.25keywords = cell (Clic here for more details about this article) |
13/2869. Renal angiomyolipoma resembling gastrointestinal stromal tumor with skenoid fibers.We report an unusual case of renal angiomyolipoma occurring in 68-year-old man. The tumor lacked well-developed vascular and adipose components and was composed almost exclusively of smooth muscle cells. Numerous skenoid-like periodic acid-Schiff-positive globules were interspersed between the tumor cells; the lesion therefore closely resembled a low-grade stromal tumor of the gastrointestinal tract. The HMB45-positive/CD34-negative immunophenotype was essential for the diagnosis of angiomyolipoma. Neither gastrointestinal tumor nor any signs of tuberous sclerosis were found. This lesion should be included in the list of morphologic variations of angiomyolipoma, which may cause diagnostic difficulties.- - - - - - - - - - ranking = 0.5keywords = cell (Clic here for more details about this article) |
14/2869. Organ-preserving surgery of renal cell carcinoma: report of four cases.Authors removed the renal tumour of four patients by means of resection in an organ-preserving manner. Of the four patients, one had bilateral carcinoma. The right-sided carcinoma of this patient was removed by resection while the other kidney was removed radically, by transabdominal approach. In three of the four cases which were in the process of stages T1 and N0M0, organ-preserving surgery was performed in the presence of intact opposite kidneys. Authors point out the fact that the resection method might be indicated even in the case of early (T1) stage tumours with intact opposite side kidneys. Furthermore, they do not recommend the enucleation of renal carcinomas for the surgical treatment of kidney tumours, since experimental studies have proved that these tumours can be transferred into the parenchyma of the kidney through the pseudocapsule of the tumour.- - - - - - - - - - ranking = 1keywords = cell (Clic here for more details about this article) |
15/2869. Two new cases of papillary renal cell carcinoma with t(X;1)(p11;q21) in females.Two cases of papillary renal cell carcinoma (RCC) with a karyotype 46,X,t(X;1)(p11.2;q21) in two female patients aged 9 and 29 years are reported. These observations, and the review of the 17 reported cases with a translocation at band Xp11 confirm that this abnormality delineates a clinicopathological entity within the classical papillary RCC, characterized by the early age of occurrence and, probably, distinct histological features. Including these two new female cases, the sex ratio in cases with t(X;1) appears similar to that observed in the other papillary RCC.- - - - - - - - - - ranking = 1.25keywords = cell (Clic here for more details about this article) |
16/2869. Fine-needle aspiration cytology of well-differentiated inflammatory liposarcoma: a case report with histologic follow-up.Inflammatory liposarcoma is an unusual variant of well-differentiated liposarcoma. We report on the fine-needle aspiration (FNA) cytology findings of a retroperitoneal well-differentiated inflammatory liposarcoma from a 63-yr-old white female. The smears showed numerous dispersed inflammatory cells, with the majority being reactive lymphoid cells and plasma cells. There were scattered, large, atypical cells containing multiple or hyperlobated nuclei with coarse chromatin and abundant ill-defined cytoplasm. The large atypical cells, as well as the inflammatory cells, were also found within the fibrous tissue fragments. The follow-up surgical resection of the tumor demonstrated a well-differentiated inflammatory liposarcoma with coexistent dedifferentiated areas and lipoma-like, well-differentiated liposarcoma. With the appropriate anatomic and radiographic settings, the FNA cytology findings of abundant, reactive inflammatory cells and scattered, large, atypical tumor cells that are CD15-, CD30-, and cytokeratin-negative are highly suggestive of a well-differentiated inflammatory liposarcoma.- - - - - - - - - - ranking = 2keywords = cell (Clic here for more details about this article) |
17/2869. Renal cell carcinoma with solitary synchronous pancreaticoduodenal and metachronous periprostatic metastases: report of a case.We report herein the case of a patient who underwent successful resection of a solitary metachronous periprostatic metastasis 12 months after undergoing a right radical nephrectomy with pylorus-preserving pancreaticoduodenectomy for renal cell carcinoma (RCC) with a synchronous pancreaticoduodenal metastasis. At present the patient is free of any signs of recurrence 12 months after removal of the metachronous mass in the periprostate. This case report supports the opinion that an aggressive surgical approach is appropriate for RCC metastasis.- - - - - - - - - - ranking = 1.25keywords = cell (Clic here for more details about this article) |
18/2869. Primary primitive neuroectodermal tumor (PNET) of the kidney: a case report.OBJECTIVES: Primary primitive neuroectodermal tumor (PNET) of the kidney is an extremely rare entity and the case is presented to highlight the histological diagnostic problems. methods AND RESULTS: A 23-year-old female presented with a lump in the left hypochondrium that had appeared 3 months, earlier, which suggested a malignancy on radiological investigation. The nephrectomy specimen revealed a large tumor mass with only a small portion of normal renal parenchyma. histology showed a small cell malignant tumor and the diagnosis of PNET (primary of kidney) and small cell carcinoma were suspected. The tumor showed NSE and vimentin positivity and cytokeratin negativity, which conformed with the diagnosis of PNET. CONCLUSION: The biological behaviour of PNET is more aggressive, with rapid progression and infiltration into the surrounding tissues and distant metastases. Thus it differs from the small renal cell malignancies and hence recognition of this tumor as a distinct entity is essential.- - - - - - - - - - ranking = 0.75keywords = cell (Clic here for more details about this article) |
19/2869. Renal cell carcinoma with involvement of iris and conjunctiva.PURPOSE: To report a case of metastatic renal cell carcinoma with involvement of the iris and bulbar conjunctiva. methods: Case report. A 70-year-old man without known systemic disease developed an iris mass in his left eye. Iridocyclectomy was performed to remove the iris mass. RESULTS: Histopathologically, the iris mass was consistent with metastatic renal cell carcinoma. Further evaluation disclosed a mass of the left kidney. The patient underwent a left nephrectomy and was found to have renal cell carcinoma, with focal penetration into the renal capsule. One month after the nephrectomy, he developed a highly vascular nodule of the left bulbar conjunctiva. An excisional biopsy was performed, and histopathology disclosed an additional focus of renal cell carcinoma. CONCLUSIONS: iris and conjunctival involvement may be a clinical manifestation of renal cell carcinoma. Renal cell carcinoma should be considered in the differential diagnosis of a fleshy, vascular iris and a conjunctival nodule.- - - - - - - - - - ranking = 2.5keywords = cell (Clic here for more details about this article) |
20/2869. Primary tumor of the ureteral stump following a nephrectomy for renal cell carcinoma.BACKGROUND: A 64-year-old man presented with asymptomatic macroscopic hematuria during a follow up for a localized renal cell carcinoma (RCC), which was treated by a right radical nephrectomy 6 years earlier. methods: x-rays and a ureteroscopic examination revealed multiple papillary tumors filling the right ureteral stump. Surgery was performed to excise the ureteral stump and bladder cuff. The tumor was histologically a grade 2-3 transitional cell carcinoma without muscle invasion. RESULTS/CONCLUSIONS: Only four patients with a ureteral stump carcinoma, including the present case, have been reported after a nephrectomy for RCC. Considering that this patient had a past history of multiple cancers, genetic or environmental factors may have contributed to the etiology of the ureteral stump tumor.- - - - - - - - - - ranking = 1.5keywords = cell (Clic here for more details about this article) |
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