Correlation of Imaging and Hemodynamic Findings with Clinical Outcomes for Diagnosis of Left Renal Vein Compression Syndrome.
Cardiovascular and interventional radiology
PURPOSE:Left renal vein compression syndrome (LRVCS) remains a challenging diagnosis. This study aimed to correlate imaging and hemodynamic findings with clinical outcomes for patients with LRVCS. MATERIALS AND METHODS:A retrospective review of 66 renal venography procedures with or without intravascular ultrasound (IVUS) was performed from 2017 to 2023 at a single institution. Patients with prior LRVCS treatment or other indications were excluded (n = 11). Primary outcome measure was correlation of catheter-based endovascular (CBE) findings with clinical outcomes (n = 55). Secondary outcome measures included correlation of CBE findings and LRV (i.e., beak) angle > 32°, beak sign, aortomesenteric angle (AMA < 41°), and hilar-to-aortomesenteric ratio (HTAMR ≥ 4.9) on cross sectional imaging. Descriptive statistics, chi-square testing, and ROC analyses were used. RESULTS:Of the 55 patients, 52 (94.5%) were females (median age 31, range 14-72) and 56.4% (n = 31) had a diagnosis of LRVCS on CBE evaluation. A renocaval pressure gradient of ≥ 3 mmHg, presence of collaterals, and > 50% area stenosis on IVUS were significantly associated with CBE diagnosis of LRVCS (p < 0.001). Surgical treatment (renal autotransplantation or LRV transposition) was recommended to all patients with CBE diagnosis of LRVCS (n = 31). 81.2% (18/22) of patients who underwent surgery reported symptom resolution or improvement. When the cross sectional imaging measurements were compared with CBE evaluation, AMA was the most sensitive (100%), HTAMR and beak sign were highly specific (93.3%), and beak angle was the most predictive (77.4% sensitivity; 86.7% specificity). CONCLUSION:CBE diagnosis of LRVCS was highly predictive of surgical candidacy and post-surgical symptom resolution. The presence of collaterals, > 50% area stenosis on IVUS, or a renocaval pressure gradient ≥ 3 mmHg had a significant association with a CBE diagnosis of LRVCS.
10.1007/s00270-024-03822-w
Nutcracker syndrome (a Delphi consensus).
Journal of vascular surgery. Venous and lymphatic disorders
BACKGROUND:Nutcracker syndrome (NCS) describes the symptomatic compression of the left renal vein between the aorta and superior mesenteric artery. Whereas asymptomatic compression is a common radiological finding, patients with NCS can report a range of symptoms. There are no specific diagnostic criteria and interventions include a range of open surgical and endovascular procedures. Therefore, we wished to develop an international consensus document covering aspects of diagnosis, management, and follow-up for patients with NCS. METHODS:A three-stage modified Delphi consensus was performed. A steering committee developed 37 statements covering 3 categories for patients with NCS: diagnosis, management, and follow-up. These statements were reported individually by 20 international experts in the management of venous disease, using a 5-point Likert scale. Consensus was defined if ≥70% of respondents rated the statement between 1 and 2 (agreement) and between 4 and 5 (disagreement). Those statements without consensus were recirculated in a second round of voting. A third round of the questionnaire was performed with 14 additional statements to clarify diagnostic values of NCS. RESULTS:Responses were returned by 20 of 20 experts (100%) in round one and 17 of 20 (85%) in round two. Initial consensus was reached in 24 of 37 statements (65%) spread over all categories. Round two achieved a further consensus on 5 out of 10 statements (50%). No categories reported consensus on all statements. In round two consensus was reached in the category of follow-up (4/5 statements [80%]). The final round reached consensus on 5 out of 14 statements (36%). Experts agreed that imaging is obligated to confirm NCS. Experts did not agree on specific diagnostic cut-off values. There was a consensus that the first choice of operative treatment is left renal vein transposition and that the risk of stent migration outweighs the advantages of a percutaneous procedure. CONCLUSIONS:Consensus was achieved on most statements concerning the assessment and management of NCS. This Delphi consensus identified those areas in which further research is needed, such as antiplatelet therapy, endovascular treatment, and renal autotransplantation. A rare disease registry to improve data and reports of patient outcomes is warranted.
10.1016/j.jvsv.2024.101970
Bilateral Congenital Pelvic Arteriovenous Malformation: A Case Report and Review of Literature.
Journal of endovascular therapy : an official journal of the International Society of Endovascular Specialists
PURPOSE:Through a paradigmatic case and a systematic literature review, we present various endovascular strategies for treating pelvic paravesical arteriovenous vascular malformations (AVMs), with a focus on the efficacy of accessing the shunt point through direct puncture of the venous collector. CASE REPORT:A 42-year-old male with nonspecific pelvic pain underwent a computed tomography (CT) scan, which revealed bilateral pelvic AVMs characterized by a network of arteriolar afferents originating from the internal iliac arteries and the inferior mesenteric artery, draining into 2 interconnected giant venous sacs in the bilateral paravesical space. The malformation was classified as type II according to the Cho classification. Following an unsuccessful attempt at transarterial embolization, we devised a plan for bilateral transvenous embolization in 2 separate sessions. Venous access was achieved through percutaneous transperineal ultrasound-guided puncture of the dominant outflow venous sac. A microcatheter was then placed directly into the shunt point, where sclerosant and embolic agents were specifically delivered. Follow-up imaging showed complete obliteration of both pelvic AVMs. CONCLUSIONS:Effective hemostasis of pelvic paravesical AVMs can be achieved by targeting the shunt point from the aneurysmal dominant outflow vein, potentially through direct percutaneous puncture. CLINICAL IMPACT:This study aims to demonstrate the effectiveness of a transvenous approach in cases of embolization of pelvic paravesical arteriovenous vascular malformations (AVMs). The key to successful treatment lies in occluding the shunt point within the aneurysmal dominant outflow vein's wall, which can be reached transvenously and potentially through direct percutaneous puncture. Although arterial occlusion can be performed additionally, it should not be performed alone due to its higher risk of AVM persistence/recurrence.
10.1177/15266028241267747
[Treatment of varicocele combined with asthenospermia by microsurgical shunt: 3 cases report].
Wang Shuang,Zu Xiongbing,Liu Longfei,Tang Juyu,Hu Xiheng
Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences
To investigate the clinic value of microsurgical shunt for the treatment of varicocele combined with asthenspermia, the clinical data and therapeutic method for 3 patients, who conducted the microscope spermatic vein high ligation combined with superficial epigastric vein flow, were retrospectively analyzed. No postoperative complications were found, and the original symptoms and signs were disappeared. All patients were conducted scrotal ultrasound and semen routine after 3 months, and all indexes, including maximum internal diameter of the cord vein (erect position), sperm density, sperm survival rate, sperm deformity rate and sperm forward movement rate, were gradually improved. Consequently, high ligation of spermatic vein combined with vascular bypass surgery under the microscope can block the countercurrent venous blood and establish a new return channel to the testis. Meanwhile, it can also protect the testicular artery and lymph-vessel. It is worth to be spread for the treatment of varicocele combined with asthenospermia.
10.11817/j.issn.1672-7347.2017.10.017