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Collecting duct carcinoma (CDC) of the kidney is an aggressive disease with a poor prognosis, accountings for less than 1% of all renal cancers. To date, no standard therapy for CDC has been established. The aim of this study is an investigation of clinicopathologic findings of CDC and correlation of the disease status with a prognosis.
From 1996 to 2009, 35 patients with CDC were treated at eight medical centers. The diagnosis of CDC was made based on nephrectomy in 27 cases and renal biopsy in eight cases.
Median PFS and OS for all patients were 5.8 months (95% CI 3.5 to 9.2) and 54.4 months (95% CI 0 to 109.2), respectively. The OS of patients with Stages I-III was 69.9 months (95% CI 54.0 to 85.8), while that of patients with Stage IV was 8.6 months (95% CI 0 to 23.3), which showed a statistically significant difference (p=0.01). In addition, among patients with Stage IV, the OS of patients who received a palliative treatment (immunotherapy, chemotherapy, or targeted therapy) was 18.4 months, which was higher than the OS of patients without treatment of 4.5 months.
CDC is a highly aggressive form of renal cell carcinoma. Despite most of the treatments, PFS and OS were short, however, there were some long-term survivors, therefore, conduct of additional research on the predictive markers of the several clinical, pathological differences and their treatments will be necessary.
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Von Hippel-Lindau Disease: Current Challenges and Future Prospects
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The proper dose and schedule of sunitinib have yet to be established for patients with metastatic renal cell carcinoma (RCC) on hemodialysis. We reviewed two patients with metastatic RCC on hemodialysis who had been treated with sunitinib in Yonsei Cancer Center, Yonsei University College of Medicine. Fifty milligrams of sunitinib was administered intermittently after each hemodialysis session (3 or 4 times a week). Overall responses were partial response in both cases. Progression-free survivals were 16 and 6 months, respectively, at the time of reporting (April 2010). Both subjects tolerated the treatment.
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The retrospective study was performed to assess the efficacy and toxicity profiles of sunitinib in Korean patients with metastatic renal cell carcinoma (RCC).
Between January 2005 and December 2008, 76 Korean patients with recurrent/metastatic RCC who received sunitinib were retrospectively reviewed. The primary end point was progression-free survival and the secondary end points were overall survival and response rate. We also assessed the toxicities associated with sunitinib treatment.
Of the 76 patients, 69 (90.1%) were diagnosed with clear cell RCC. The median progression-free survival and overall survival were 7.2 and 22.8 months, respectively in overall patients. Sixty-two patients (81.6%) received 50 mg 4 week and 2 week off schedule, and 14 patients (18.4%) received 37.5 mg daily on a daily continuous schedule. The objective response rate and disease control rate were 27.6% and 84.2%, respectively. A dose reduction or reduction in dose due to adverse events occurred in 76% of the patients, whereas 11% of the patients had discontinued treatment. Other common laboratory abnormalities were increased serum creatinine (75.6%), elevated alanine aminotransferase (71.0%), neutropenia (61.8%), anemia (69.7%), and increased aspartate aminotrasferase (53.3%). Grade 3/4 toxicities occurred as follows: thrombocytopenia (38.2%), fatigue (10.5%), stomatitis (10.5%), and hand-foot syndrome (9.2%).
Our results indicate that sunitinib treatment is effective and tolerable for ecurrent/metastatic RCC patients in Korea. Further studies with prognostic or biochemical factors are needed to clarify the different toxicity profiles of this study.
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To evaluate the feasibility and efficacy of performing laparoscopic renal cryoablation (LRC) for the treatment of RCC, as compared with open partial nephrectomy (OPN), which is the established NSS.
From April 2004, among the patients who underwent LRC with a 1.47 mm cryoprobe, we enrolled 20 patients who were pathologically confirmed as having RCC with a tumor size smaller than 4 cm. These patients were matched with a group of 20 patients, who were selected based on the pre-operative characteristics of the tumor and those of the patients, from a pre-existing database of the patients who underwent OPN during the same period.
The mean age and tumor size were 56.3±11.5 years and 2.4±1.7 cm in the LRC group, and 57.6±10.9 years and 2.2±1.1 cm in the OPN group. The two groups were similar for their age, gender, BMI, ASA, the tumor characteristics and the indications for operation. While the pathologic results and the operation time showed similarity, the EBL (98±87 ml vs 351±147 ml, respectively, p=0.001), the transfusion rate (10% vs 40%, respectively, p=0.03) and the hospital stay (4.2±1.5 days vs 8.2±2.4 days, respectively, p=0.005) were significantly less in the LRC group. Major complications did not occur in the LRC group, but in the OPN group, one patient experienced urine leakage and one patient had a perirenal hematoma. During the mean follow up of 27.3±10.8 months and 28.7±14.9 months for each group, respectively, all the patients remained disease-free with no evidence of local recurrence or metastases.
LRC using ultra-thin cryoprobes for the treatment of small RCC showed similar effective oncologic results with the merits of minimal invasiveness, as compared with OPN, during the intermediate term follow up.
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Renal cell carcinoma (RCC) may metastasize to almost any organ, but metastasis to the small bowel is rare. Small bowel metastasis from RCC can induce obstruction or bleeding, and perforation can also be induced in rare case. Yet RCC metastasis to the small bowel is unlikely to be a direct cause of intussusceptions. A few cases of intussusceptions caused by small intestinal metastasis of RCC have been reported, but multiple small intestinal intussusceptions are extremely rare. We report here on a 47-year-old male patient who presented to the emergency room with acute abdominal pain. He had undergone radical nephrectomy 2 years previously due to left RCC. The abdominal CT scan revealed enhanced masses with the "target" sign that suggested enteric intussusceptions in the jejunum. Eight pedunculated masses within the small intestinal lumen led to intussusceptions at 30 and 150 cm distal to Treitz ligament. Three segmental resections of the small intestine and functional end to end anastomosis were done. The patient recovered uneventfully from this operation. To the best of our knowledge, this is the 1st report of metastases from RCC that presented as synchronous intraluminal polypoid tumors, and these tumors served as the lead points for two intussusceptions in the jejunum.
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