Project description:Purpose:Developed a preoperative prediction model based on multimodality imaging to evaluate the probability of inferior vena cava (IVC) vascular wall invasion due to tumor infiltration. Materials and Methods:We retrospectively analyzed the clinical data of 110 patients with renal cell carcinoma (RCC) with level I-IV tumor thrombus who underwent radical nephrectomy and IVC thrombectomy between January 2014 and April 2019. The patients were categorized into two groups: 86 patients were used to establish the imaging model, and the data validation was conducted in 24 patients. We measured the imaging parameters and used logistic regression to evaluate the uni- and multivariable associations of the clinical and radiographic features of IVC resection and established an image prediction model to assess the probability of IVC vascular wall invasion. Results:In all of the patients, 46.5% (40/86) had IVC vascular wall invasion. The residual IVC blood flow (OR 0.170 [0.047-0.611]; P = 0.007), maximum coronal IVC diameter in mm (OR 1.203 [1.065-1.360]; P = 0.003), and presence of bland thrombus (OR 3.216 [0.870-11.887]; P = 0.080) were independent risk factors of IVC vascular wall invasion. We predicted vascular wall invasion if the probability was >42% as calculated by: {Ln?[Pre/(1 - pre)] = 0.185 × maximum?cornal?IVC?diameter + 1.168 × bland?thrombus-1.770 × residual?IVC?blood?flow-5.857}. To predict IVC vascular wall invasion, a rate of 76/86 (88.4%) was consistent with the actual treatment, and in the validation patients, 21/26 (80.8%) was consistent with the actual treatment. Conclusions:Our model of multimodal imaging associated with IVC vascular wall invasion may be used for preoperative evaluation and prediction of the probability of partial or segmental IVC resection.
Project description:Surgical management of renal cell carcinoma (RCC) with inferior vena cava (IVC) thrombus is inherently complex, posing challenges for even the most experienced urologists. Until the mid-2000s, nephrectomy with IVC thrombectomy was exclusively performed using variations of the open technique initially described decades earlier, but since then several institutions have reported their robotic experiences. Robotic IVC thrombectomy was initially reported for level I and II thrombi, and more recently in higher-lever III thrombi. In general, the robotic approach is associated with less blood loss and shorter hospital stays compared to the open approach, low rates of open conversion in reported cases, relatively low rates of high-grade complications, and favorable overall survival on short-term follow-up in limited cohorts. Operative times are longer, costs are significantly higher, and left-sided tumors always require intraoperative repositioning and usually require preoperative embolization. To date, criteria for patient selection or open conversion have not been defined, and long-term oncologic outcomes are lacking. While the early published robotic experience demonstrates feasibility and safety in carefully selected patients, longer-term follow-up remains necessary. Patient selection, indications for open conversion, logistics of conversion particularly in emergent settings, necessity and safety of preoperative embolization, the value proposition, and long-term oncologic outcomes must all be clearly defined before this approach is widely adopted.
Project description:BackgroundInferior vena cava tumor thrombus (IVC-TT) is a rare yet deadly sequel of renal cell carcinoma (RCC) with limited treatment options. The standard treatment is extirpative surgery, which has high rates of morbidity and mortality. As a result, many patients are unfit or unwilling to undergo surgery and face poor prognosis. This stresses the need for alternative options for local disease control. Our study aims to assess the feasibility and oncological outcomes of stereotactic ablative radiation (SAbR) for IVC-TT.MethodsA retrospective study reviewing six leading international institutions' experience in treating RCC with IVC-TT with SAbR. Primary end point was overall survival using Kaplan-Meier.ResultsFifteen patients were included in the cohort. Over 50% of patients had high level IVC-TT (level III or IV), 66.7% had metastatic disease. Most eschewed surgery due to high surgical risk (7/15) or recurrent thrombus (3/15). All patients received SAbR to the IVC-TT with a median biologically equivalent dose (BED10) of 72 Gy (range: 37.5-100.8) delivered in a median of 5 fractions (range 1-5). Median overall survival was 34 months. Radiographic response was observed in 58% of patients. Symptom palliation was recorded in all patients receiving SAbR for this indication. Only grade 1 to 2 adverse events were noted.ConclusionsSAbR for IVC-TT appears feasible and safe. In patients who are not candidates for surgery, SAbR may palliate symptoms and improve outcomes. SAbR may be considered as part of a multimodal treatment approach for patients with RCC IVC-TT.
Project description:ObjectiveTo develop radiomics models to predict inferior vena cava (IVC) wall invasion by tumor thrombus (TT) in patients with renal cell carcinoma (RCC).MethodsPreoperative MR images were retrospectively collected from 91 patients with RCC who underwent radical nephrectomy (RN) and thrombectomy. The images were randomly allocated into a training (n = 64) and validation (n = 27) cohort. The inter-and intra-rater agreements were organized to compare masks delineated by two radiologists. The masks of TT and IVC were manually annotated on axial fat-suppression T2-weighted images (fsT2WI) by one radiologist. The following models were trained to predict the probability of IVC wall invasion: two radiomics models using radiomics features extracted from the two masks (model 1, radiomics model_IVC; model 2, radiomics model_TT), two combined models using radiomics features and radiological features (model 3, combined model_IVC; model 4, combined model_TT), and one radiological model (model 5) using radiological features. Receiver operating characteristic (ROC) curve analysis and decision curve analysis (DCA) were applied to validate the discriminatory effect and clinical benefit of the models.ResultsModel 1 to model 5 yielded area under the curves (AUCs) of 0.881, 0.857, 0.883, 0.889, and 0.769, respectively, in the validation cohort. No significant differences were found between these models (p = 0.108-0.951). The dicision curve analysis (DCA) showed that the model 3 had a higher overall net benefit than the model 1, model 2, model 4, and model 5.ConclusionsThe combined model_IVC (model 3) based on axial fsT2WI exhibited excellent predictive performance in predicting IVC wall invasion status.
Project description:IntroductionThe effectiveness of nivolumab plus cabozantinib for metastatic papillary renal cell carcinoma with inferior vena cava tumor thrombus remains unclear.Case presentationA 77-year-old male was diagnosed with right papillary renal cell carcinoma with a metastatic lesion on Gerota's fascia, lymph node metastasis, and inferior vena cava tumor thrombus. He was treated with nivolumab plus cabozantinib. As all lesions regressed enough to permit complete resection, radical nephrectomy, thrombectomy, and retroperitoneal lymph node dissection were performed. No viable malignant cells were identified histopathologically. Despite the discontinuation of nivolumab plus cabozantinib, there has been no recurrence for 9 months.ConclusionNivolumab plus cabozantinib has effectiveness for metastatic papillary renal cell carcinoma with inferior vena cava tumor thrombus.
Project description:BackgroundUrothelial carcinoma (UC) of the renal pelvis with renal vein and inferior vena cava (IVC) tumor thrombus (TT) was extremely rare. We aimed to explore the clinical and pathological characteristics, diagnosis and treatment of renal pelvis UC with renal vein and IVC TT.MethodsFrom March 2016 to January 2019, eight patients of renal pelvis UC with renal vein and IVC TT were diagnosed and underwent operation in our hospital. Clinical features, operative details, pathological outcomes, and prognosis data were reviewed and collected.ResultsThere were five males and three females (52-84 years old). Their main symptoms were flank pain and hematuria. According to the Mayo classification, the TT was 4 level-0 (1 left and 3 right), 2 level-I (right), and 2 level-II (right). Half the patients underwent retroperitoneal laparoscopic radical nephroureterectomy with thrombectomy, and the other underwent open procedures. The mean operative time was 298.9 minutes. Pathological outcomes revealed high-grade UC, with positive lymph nodes in 6 cases. Four patients received adjuvant chemotherapy, one target therapy and one adjuvant chemotherapy combined with immunotherapy after surgery. The mean follow-up time was 11.1 months. Three patients are alive, and two of them developed recurrence and lung metastasis.ConclusionsPreoperative differentiation between renal pelvis UC and renal cell carcinoma with venous TT was very important for the management. Radical nephroureterectomy with thrombectomy might be a reasonable method for renal pelvis UC with venous TT. The prognosis of such cases was poor even if adjuvant therapy was scheduled.
Project description:Background: Renal angiomyolipoma (AML) without local invasion is generally considered benign. However, it may extend to the renal sinus, even the renal vein, or the inferior vena cava (IVC). In patients with non-tuberous sclerosis complex, coexistence of renal cell carcinoma (RCC) and renal AML is uncommon. Case presentation: A 72-year-old woman was incidentally found to have a solitary right renal mass with an IVC thrombus extending into the right atrium during a routine health checkup. Robot-assisted laparoscopic radical nephrectomy and thrombectomy were successfully performed through adequate preoperative examination and preparation. Two tumor lesions were found and pathologically confirmed as renal AML and RCC, and the tumor thrombus was derived from the renal AML. During the one-year follow-up period, no signs of recurrence or metastatic disease were observed. Conclusions: Renal AML with a tumor thrombus in the IVC and right atrium accompanied by RCC may occur, although rarely. In clinical practice, if preoperative manifestations differ from those of common diseases, rare diseases must be considered to avoid missed diagnoses. In addition, adequate examination and multidisciplinary discussions before making a diagnosis are necessary. For a level 4 tumor thrombus with no infringement of the venous wall, adoption of robot-assisted minimally invasive surgery, without extracorporeal circulation technology, is feasible.
Project description:Renal tumor with inferior vena cava (IVC) tumor thrombus still remains one of the most medical challenges in urological oncology. Despite numerous researches reporting the surgical experiences and survivals of this kind of patients, there is still lacking a standard recommended therapy right now. We reported a case of metastatic renal cell carcinoma with Mayo III IVC tumor thrombus who underwent robotic-assisted complete removal of the intracaval thrombus and radical left nephrectomy followed by renal arterial chemoembolization and pazopanib administration. It provides a new scheme and mode of diagnosis and treatment for this kind of patients. The patient was a 50-year-old man with left low-back pain for 20 days diagnosed with left renal tumor and Mayo III IVC tumor thrombus at the earliest. Initially, the patient underwent the renal arterial chemoembolization and targeted treatment to inhibit tumor's progression. After a two-year therapy period, the size of renal mass and lung nodules decreased than before, as well as the IVC tumor thrombus dropped to level II. Considering the efficacy of previous treatments, we performed robot-assisted IVC thrombectomy and radical left nephrectomy for this patient. The post-operative pathological examination confirmed the diagnosis of tumor thrombus as renal clear cell carcinoma. The patients recovered well after surgery and was followed-up for 36 months during the whole treatment course. This case with metastatic renal cell carcinoma (mRCC) and Mayo III IVC tumor thrombus received the interventional therapy, molecular targeted therapy and robot-assisted surgery successively, and acquired satisfying outcome. Patients with mRCC always suffer shorter overall survivals and aggressive progression compared with those localized tumors, therefore it is essential to formulate rational comprehensive treatment and carry out in time following-up.
Project description:PurposeTo evaluate the feasibility, safety, oncologic outcomes, and immune effect of neoadjuvant stereotactic radiation (Neo-SAbR) followed by radical nephrectomy and thrombectomy (RN-IVCT).Methods and materialsThese are results from the safety lead-in portion of a single-arm phase 1 and 2 trial. Patients with kidney cancer (renal cell carcinoma [RCC]) and inferior vena cava (IVC) tumor thrombus (TT) underwent Neo-SAbR (40 Gy in 5 fractions) to the IVC-TT followed by open RN-IVCT. Absence of grade 4 to 5 adverse events (AEs) within 90 days of RN-IVCT was the primary endpoint. Exploratory studies included pathologic and immunologic alterations attributable to SAbR.ResultsSix patients were included in the final analysis. No grade 4 to 5 AEs were observed. A total of 81 AEs were reported within 90 days of surgery: 73% (59/81) were grade 1, 23% (19/81) were grade 2, and 4% (3/81) were grade 3. After a median follow-up of 24 months, all patients are alive. One patient developed de novo metastatic disease. Of 3 patients with metastasis at diagnosis, 1 had a complete and another had a partial abscopal response without the concurrent use of systemic therapy. Neo-SABR led to decreased Ki-67 and increased PD-L1 expression in the IVC-TT. Inflammatory cytokines and autoantibody titers reflecting better host immune status were observed in patients with nonprogressive disease.ConclusionsNeo-SAbR followed by RN-IVCT for RCC IVC-TT is feasible and safe. Favorable host immune environment correlated with abscopal response to SABR and RCC relapse-free survival, though direct causal relation to SABR has yet to be established.