Trends in endovascular aneurysm repair research: bibliometric analysis from 1994 to 2017

PURPOSE: Since endovascular aneurysm repair (EVAR) was first introduced in 1991, it has undergone rapid technical and quantitative developments. We analyzed the characteristics and trends of EVAR research through bibliometric analysis. METHODS: Comprehensive online searches focused on EVAR were performed from January 1994 to August 2017. The following information was collected: title, year of publication, countries' contribution, authorship, subspecialty, institution, subject category, and top 10 cited articles. RESULTS: A significant increase was demonstrated globally in the number of annual publications on EVAR. The highest number of publications was from the United States (n = 849, 35.08%), followed by England (n = 343, 14.17%), and the institutions with highest number of publications were Stanford University (n = 61, 2.52%) and Skane University Hospital Malmo (n = 45, 1.86%). The Journal of Vascular Surgery published approximately one quarter of the total publications. Vascular surgeons produced the most publications (n = 1871, 78.14%), followed by radiologists (n = 377, 15.58%) and cardiologists (n = 73, 3.02%). The most studied topics on EVAR were complications and procedures. The number of publications on complex EVAR and EVAR in juxtarenal aneurysm has increased more from 2013 to 2017 (5.1%, 9.5%) compared with from 1998 to 2002 (2.1%, 1.8%). CONCLUSION: Our bibliometric analysis showed the characteristics and trends of publications on EVAR over a period of 25 years. The results of the bibliometric analysis revealed the quantitative improvements of publications and the qualitative improvements in challenging EVAR.

Adenosquamous Carcinoma of Duodenal Bulb Mimicking Subepithelial Tumor on Computed Tomography: A Case Report

Adenosquamous carcinomas of the duodenum are extremely rare neoplasms in which both glandular and squamous elements demonstrate malignant characteristics. Few cases of adenosquamous carcinoma involving the second or third segment of the duodenum have been reported in the literature. Herein, we report the first case of adenosquamous carcinoma of the bulb of the duodenum that mimicked subepithelial tumor on computed tomography in a 59-year-old man.

Inhibitory effect of sustained perivascular delivery of paclitaxel on neointimal hyperplasia in the jugular vein after open cutdown central venous catheter placement in rats

PURPOSE: Inhibitory effect of paclitaxel on neointimal hyperplasia after open cutdown has not been elucidated. METHODS: For the control group (n = 16), silicone 2.7-Fr catheters were placed via the right external jugular vein with the cutdown method. For the treatment group (n = 16), a mixture of 0.65 mg of paclitaxel and 1 mL of fibrin glue was infiltrated around the exposed vein after cutdown. After scheduled intervals (1, 2, 4, and 8 weeks), the vein segment was harvested and morphometric analysis was performed on cross-sections. RESULTS: Proliferation of smooth muscle cell (SMC) was strongly suppressed in the treatment group, and the ratio of neointima to vein wall was significantly reduced in the treatment group (8 weeks; 0.63 ± 0.08 vs. 0.2 ± 0.08, P < 0.05). Luminal patency was significantly more preserved in the treatment group, and the luminal area was significantly wider in the paclitaxel-treated group compared to the control group (8 weeks; 1.91 ± 0.43 mm² vs. 5.1 ± 0.43 mm², P < 0.05). Mean SMC counts measured at 1 and 2 weeks after cutdown were significantly lower in the treatment group (2 weeks; 115 ± 22 vs. 62 ± 22). Paclitaxel was undetectable in systemic circulation (<10 ng/mL). CONCLUSION: Sustained perivascular delivery of paclitaxel with fibrin glue was effective in inhibiting neointimal hyperplasia in rat jugular vein after open cutdown.

Transumbilical Laparoscopic Cholecystectomy with Additional Port: A Single Surgeon's Experience with 291 Cases

PURPOSE: Single-port laparoscopic cholecystectomy may result in postoperative complication in patients with cholecystitis. An additional right subcostal port could make laparoscopic surgery safe in these patients. We suggest the transumbilical laparoscopic cholecystectomy with additional port, which can be performed safely regardless of cholecystitis. METHODS: Consecutive 291 patients underwent transumbilical laparoscopic cholecystectomy in the Department of Surgery by a single surgeon. We have usually used the globe port in the transumbilical area and an additional right subcostal port. RESULTS: The mean operation time was 44.0+/-15.2 min (range: 20-140). The mean hospital stay after operation was 4.0+/-2.3 days (range: 1-9). Postoperative complications were umbilical hernia (n=7) and bile leakage (n=3). There was no in-hospital mortality. CONCLUSION: Transumbilical laparoscopic cholecystectomy can be performed in patients with most of benign gallbladder disease. And, an additional right subcostal port could be helpful in ensuring safe transumbilical laparoscopic cholecystectomy, even in patients with cholecystitis.

What we learned from difficult hepatectomies in patients with advanced hepatic malignancy

BACKGROUNDS/AIMS: By reviewing difficult resections for advanced hepatic malignancies, we discuss the effectiveness and extended indications for hepatectomy in such patients. METHODS: We reviewed 7 patients who underwent extensive surgery between July 2008 and March 2011 for advanced hepatic malignancies. They had stage IV disease, except for in one case that was a stage IIIC (T4N0M0) hepatocellular carcinoma (HCC). RESULTS: Patient 1 with intrahepatic cholangiocarcinoma (IHCC) underwent right hemihepatectomy and resection of the bile duct and left portal vein. At 39 months after surgery, she had no recurrence or metastasis. Patient 2 with HCC underwent palliative right trisectionectomy. At 38 months after surgery, he is alive despite residual pulmonary metastases. Patient 3 with HCC invading the hepatic vein and diaphragm underwent right trisectionectomy and caval venoplasty. At 12 months after surgery, he had no recurrence or metastasis. Patient 4, who had 2 large HCCs and pulmonary thromboembolism, underwent a right trisectionectomy. At 7 months after surgery, he had no evidence of recurred HCC. Patient 5, who had IHCC invading her inferior vena cava and main portal vein, underwent preoperative radiotherapy, left hemihepatectomy, and caval resection. At 20 months after surgery, she is well despite a caval thrombus. Patient 6 and 7 underwent repeated surgery due to a recurred IHCC and metastatic colon cancer, respectively. In addition, they are alive during each 20 and 17 months after surgery. CONCLUSIONS: Despite macroscopic extrahepatic metastases or major vessel involvement, extensive surgery for advanced hepatic malignancy may result in relatively favorable outcomes and be important modality for improving of survival in such patients.

Comparison of Laparoscopy and Exploration in the Distal Pancreatectomy

BACKGROUND: To determine the benefits of laparoscopic surgery compared with exploration, the clinical outcomes of open and laparoscopic distal pancreatectomy were compared. METHOD: From March 2005 to June2007, we studied 95 patients at Asan Medical Center. These patients had benign pancreatic disease in the distal pancreas, e.g. a cystic neoplasm. These patients underwent a distal pancreatectomy with or without spleen-preservation using laparoscopic or exploration surgery. We divided these patients into two groups i.e. laparoscopy (n=60) and exploration (n=35), and compared the outcomes of the two groups retrospectively. RESULT: There was no difference in demographic features between the two groups. Laparoscopic resection required a median time of 208 mins, compared with 190 mins for the open resection. (p>0.05) The laparoscopic patients started a liquiddiet on postoperative day three, and required a median hospital stay of 11 days, compared with 4.5 days and 16 days for the open resection surgery, respectively. (p0.05) The pancreatic fistula rate was lower in the laparoscopic patient group than in the open group. (8.3% vs. 14.3%) (p>0.05) The rate of spleen-preservation was higher in the laparoscopy group than the open group. (25% vs. 5.7%), (p>0.05) CONCLUSION: The results of this study showed that the laparoscopic distal pancreatectomy had a similar surgical time, an early start of the diet, a shorter hospital stay, and a higher spleensaving rate, compared to exploration surgery. Therefore, considering the benefits of laparoscopic surgery, it appears to be the preferred approach, with or without spleen-preservation, for treating benign distal pancreatic disease.