Superior Pancreaticoduodenal Research Articles

Endovascular Treatment of Unruptured Pancreatic Arcade Aneurysms.

This study aimed to assess the safety and efficacy of endovascular treatment of unruptured pancreatic arcade aneurysms in a single-center series. The electronic medical records of patients who underwent endovascular treatment for unruptured pancreatic arcade aneurysms between 2011 and 2022 at our tertiary center were retrospectively reviewed. The presence of celiac artery stenosis/occlusion; aneurysm number, location, and size; endovascular technique; procedure-related complication incidence; and clinical outcomes were assessed. Twenty-three patients (12 men and 11 women; mean [range] age, 63.8 [45-84] years) with 33 unruptured pancreatic arcade aneurysms were identified. Celiac artery stenosis/occlusion coexisted in 17 (74%) patients. Five (21%) patients had multiple aneurysms. The median aneurysm size was 9.3mm (range, 4-18mm). Seven, 6, 6, 5, 4, 3, and 2 aneurysms were located in the gastroduodenal, dorsal pancreatic, anterior superior pancreaticoduodenal, inferior pancreaticoduodenal, posterior inferior pancreaticoduodenal, posterior superior pancreaticoduodenal, and anterior inferior pancreaticoduodenal arteries, respectively. Four (15%) and 22 (85%) aneurysms were treated with endosaccular packing alone and coil embolization with endosaccular packing and parent artery occlusion, respectively, with resulting exclusion from arterial circulation. The remaining 7 aneurysms coexisting with larger aneurysms in other peripancreatic arteries were observed without embolization because they were small and for preserving collateral blood flow to the celiac artery. The treated aneurysms did not rupture or recur during the follow-up period (median, 40months). Endovascular treatment is a safe and effective treatment for unruptured pancreatic arcade aneurysms. 3, non-controlled retrospective cohort study.

Pancreaticoduodenectomy after postoperative gastric tube reconstruction for esophageal cancer with median arcuate ligament syndrome: a case report

BackgroundPancreaticoduodenectomy (PD) is considered a challenging surgery for resecting the gastroduodenal artery (GDA), right gastric artery (RGA), and lymph node tumors. In cases of pancreatic head cancer surgery, vascular anastomosis or right gastroepiploic artery (RGEA)/GDA preservation is necessary after postoperative gastric tube reconstruction for esophageal cancer. Therefore, we report for the first time an extremely rare case of PD in a patient with pancreatic head cancer and median arcuate ligament syndrome (MALS) after gastric tube reconstruction following esophageal cancer surgery, in which the entire pancreatic head arcade was preserved.Case presentationThe patient was a 76-year-old man who had undergone esophageal cancer surgery after sternal gastric tube reconstruction 7 years ago. He was referred to our hospital because of the suspicion of intraductal papillary mucinous carcinoma (IPMC) owing to an enlarged cystic lesion and a substantial component in the uncinate process of the pancreas. Preoperative three-dimensional computed (3D-CT) tomography angiography showed celiac axis stenosis and pancreatic head arcade dilation. The diagnosis was IPMC without evidence of invasion; therefore, gastric tube blood flow was maintained by preserving the GDA and RGEA. Due to MALS, the GDA blood flow was supplied through the pancreatic head arcade, necessitating its preservation. The GDA-RGEA, right gastroepiploic vein, and anterior superior pancreaticoduodenal artery were taped over the entire pancreatic head for preservation. The inferior pancreaticoduodenal artery (IPDA) was also taped on the dorsal pancreas and the posterior or anterior IPDA, which further bifurcates were taped to preserve them. Subsequently, PD was performed.ConclusionWe report a case of PD after gastric tube reconstruction for esophageal cancer with MALS, in which the pancreatic head arcade vessels were successfully preserved using 3D-CT to confirm the operation of the vessels.

Successful treatment for pseudoaneurysm following distal pancreatectomy with celiac axis resection without postoperative pancreatic fistula: a case report

BackgroundDistal pancreatectomy with celiac axis resection (DP–CAR) represents an innovative surgical approach for locally advanced pancreatic body cancer in cases involving celiac axis invasion. However, this procedure carries significant perioperative risks, including arterial aneurysms and organ ischemia. Understanding these risks is crucial for optimizing patient outcomes and guiding treatment decisions.Case presentationThis case report describes a unique case of a 74-year-old male patient who was diagnosed with locally advanced pancreatic body cancer with invasion of the celiac and splenic arteries. He underwent DP–CAR after six cycles of chemotherapy. His postoperative course was uneventful without any evidence of postoperative pancreatic fistula. However, at the 10-month postoperative follow-up, pseudoaneurysm was incidentally detected in the anterior superior pancreaticoduodenal artery by follow-up computed tomography. It was successfully treated with coil embolization. He had no signs of tumor recurrence or relapse of pseudoaneurysm formation 2 years postoperatively. This case report discusses the potential risks of pseudoaneurysm formation in patients undergoing DP–CAR due to hemodynamic changes. We emphasize the significance of close monitoring in such cases.ConclusionsThe case highlights the importance of recognizing and managing potential complications associated with DP–CAR in patients with pancreatic cancer. Despite its effectiveness in achieving complete resection, DP–CAR carries inherent risks, including the development of pseudoaneurysms. Vigilant surveillance and prompt intervention are crucial for optimizing patient outcomes and minimizing postoperative complications.

Retrograde drainage for duodenal stump leakage using ileal decompression tube guided by double-balloon endoscopy: a novel case report

BackgroundDuodenal stump leakage is a serious post-gastrectomy complication, and there have been no reports on endoscopic drainage.Case presentationWe report a case of duodenal stump leakage after laparoscopic gastrectomy with Roux-en-Y reconstruction in a 68-year-old man. First-line conservative management was ineffective. Reoperation was performed because of severe abdominal pain and increased ascites. After reoperation, duodenal stump leakage recurred with bleeding from the anterior superior pancreaticoduodenal artery. Coil embolization and pigtail catheter insertion were performed. Furthermore, we retrogradely inserted an ileal tube for tube decompression near the duodenal stump using double-balloon endoscopy for effective drainage. After tube insertion, duodenal stump leakage decreased; on the 47th primary postoperative day, the patient was discharged. The primary postoperative course was uneventful after 1 year and 9 months of follow-up.ConclusionsThis is the first successful case of duodenal stump leakage treated with retrograde decompression tube insertion near the duodenal stump using double-balloon endoscopy.

Pancreatic pseudoaneurysm mimicking pancreatic tumor: A case report and review of literature

BACKGROUND Pancreatic pseudoaneurysm is a rare vascular complication of chronic pancreatitis (CP) or necrotizing pancreatitis with an incidence of 4% to 17%, but it is potentially life-threatening. It is well known that most pancreatic pseudoaneurysms are clinically associated with pancreatic pseudocysts and are usually in the peripancreatic body-tail. A minority of intrapancreatic pseudoaneurysms occur in the absence of pseudocyst formation. Noninvasive computed tomography (CT) and magnetic resonance imaging (MRI) are most commonly used examinations for screening pancreatic pseudoaneurysms. Notably, the rare intrapancreatic pseudoaneurysm in the pancreatic head can mimic a hypervascular solid mass and be misdiagnosed as a pancreatic tumor. CASE SUMMARY We report the case of a 67-year-old man who had been admitted to our hospital due to recurrent abdominal pain for 1 mo that was aggravated for 5 d. CT and MRI revealed a mass in the pancreatic head with significant expansion of the main pancreatic duct and mild atrophy of the pancreatic body-tail. He was admitted to the department of hepatobiliary and pancreatic surgery due to the possibility of a pancreatic tumor. The patient was then referred for endoscopic ultrasonography (EUS) with possible EUS-FNA. However, EUS showed a cystic lesion in the pancreatic head with wall thickness and enhancing nodules, which was doubtful because it was inconsistent with the imaging findings. Subsequently, color doppler flow imaging demonstrated turbulent arterial blood flow in the cystic lesion and connection with the surrounding vessel. Therefore, we highly suspected the possibility of CP complicated with intrapancreatic pseudoaneurysm, combined with the patient's long-term drinking history and the sonographic features of CP. Indeed, angiography revealed an oval area of contrast medium extravasation (size: 1.0 cm × 1.5 cm) at the far-end branch of the superior pancreaticoduodenal artery, and angiographic embolization was given immediately at the same time. CONCLUSION EUS is an important differential diagnostic tool when pancreatic pseudoaneurysm mimics the imaging appearance of a hypervascular pancreatic tumor.

Effects of Preservation of Donor Liver Gastroduodenal Artery on Post-Transplant Biliary Complications in 187 Liver Transplant Recipients: A Retrospective Study.

BACKGROUND This retrospective study aimed to evaluate the effects of preservation of the donor liver gastroduodenal artery on post-transplant biliary complications in 187 liver transplant recipients. MATERIAL AND METHODS The clinical data of 187 liver transplantation recipients were retrospectively analyzed. Recipients were divided into conventional and modified groups. The technical point of the modified group is to preserve at least 2 cm of the distal gastroduodenal artery, and pay special attention to preserve the superior pancreaticoduodenal artery to ensure the distal blood supply to the common bile duct. RESULTS The modified group had significantly shorter operative time (7.17 vs 7.98) h (P<0.001) and less intraoperative blood loss (2715.40 vs 3434.93) ml (P=0.003) than the conventional group. The incidence of postoperative biliary complications (including anastomotic biliary leakage, ischemic bile duct stenosis, and anastomotic bile duct stenosis) in the modified group (4/114, 4.1%) was significantly lower (15/73, 20.5%) (P<0.001). There was no significant difference in the intraoperative cold and warm ischemia time and postoperative hospital stay length between the 2 groups. In addition, there was no significant difference in the effect of cardiac-death and brain-death sources on perioperative biliary complications, while the peak postoperative transaminase and total bilirubin were higher in patients receiving the donor liver of cardiac death (P<0.05). CONCLUSIONS Preserving the integrity of the donor gastroduodenal artery and surrounding tissue is beneficial to protect the blood supply of the extrahepatic bile duct, and can reduce the incidence of biliary complications.

Variations in the origin of the infrapyloric artery: A systematic review and meta-analysis

BackgroundThe infrapyloric artery (IPA) supplies the pylorus and the large curvature of the antrum. Its common origin points include the gastroduodenal artery (GDA) and right gastroepiploic artery (RGEA). The prevalence of variations in IPA origins can be of interest to gastric cancer surgeons who wish to increase their understanding of this vessel. The primary aim of this study was to perform a systematic review and meta-analysis on the origin of the IPA. The secondary aims were to assess imaging identification accuracy, to identify IPA morphological features, and to explore the relationship of IPA origin and clinicopathological characteristics. MethodsElectronic databases, currently registered studies, conference proceedings and the reference lists of included studies were searched through March 2023. There were no constraints based on language, publication status, or patient demographics. Database search, data extraction and risk of bias assessment were performed independently by two reviewers. The point of origin of the IPA was the primary outcome. Secondary outcomes were imaging identification accuracy, relationship between IPA origin and clinicopathological characteristics, and IPA morphological features. A random-effects meta-analysis of the prevalence of different IPA origins was conducted. Secondary outcomes were narratively synthesized given the heterogeneity of studies reporting on these. ResultsA total of 7279 records were screened in the initial search. Seven studies were included in the meta-analysis, assessing 998 patients. The IPA arose most frequently from the anterior superior pancreaticoduodenal artery (ASPDA), with a pooled prevalence of 40.4% (95% CI 17.1–55.8%), followed by the RGEA with a pooled prevalence of 27.6% (95% CI 8.7–43.7%), and the GDA with a pooled prevalence of 23.7% (95% CI 6.4–39.7%). Cases of multiple IPAs had a pooled prevalence of 4.9% (95% CI 0–14.3%). The IPA was absent in 2.6% (95% CI 0–10.3%) of cases and arose from the posterior superior pancreaticoduodenal artery (PSPDA) in the remaining 0.8% (95% CI 0 – 6.1%). Distance between the pylorus and the proximal branch of the IPA and distance from the pylorus to the first gastric branch of the RGEA when the IPA originated from the ASPDA and RGEA were longer than when the IPA originated from the GDA. The IPA is a small vessel (<1 mm), and its origin is not related to clinicopathological characteristics including patient sex, age, and tumor stage and location. ConclusionsSurgeons must be aware of the most common origin points of the IPA. Recommendations for future study include the stratification of IPA origin according to demographic characteristics, and further investigation into IPA morphological parameters such as tortuosity, course and relation to adjacent lymph nodes, aiding the creation of a standardized classification system pertaining to the anatomy of this vessel.

Rational Extent of Regional Lymphadenectomy and the Prognostic Impact of the Number of Positive Lymph Nodes for Perihilar Cholangiocarcinoma.

The definition and classification of regional nodes are not standardized for perihilar cholangiocarcinoma. This study aimed to clarify the rational extent of regional lymphadenectomy and to elucidate the impact of number-based regionalnodal classification on survival of patients with this disease. Data of 136 patients with perihilar cholangiocarcinoma who underwent surgery were reviewed. The incidence of metastasis and the survival of patients with metastasis were calculated for each node group. The incidence of metastasis for the node groups in the hepatoduodenal ligament (denoted as no. 12) ranged from 3.7% to 25.4%, with 5-year disease-specific survival of 12.9% to 33.3% for patients with metastasis. The incidences of metastasis in the common hepatic artery (no. 8) and posterior superior pancreaticoduodenal (no. 13a) node groups were 14.4% and 11.2%,respectively, with 5-year disease-specific survival rates of 16.7% and 20.0% for the patients with metastasis. When these node groups were defined as regional nodes, the 5-year disease-specific survival rates for the patients with pN0 (n = 80), pN1 (1-3 positive nodes, n = 38), and pN2 (≥4 positive nodes, n = 18) were 61.4%, 22.9%, and 17.6%, respectively (p < 0.001). The pN classification was independently associated with disease-specificsurvival (p < 0.001). When only the no. 12 node groups were regarded as regional nodes, pN classification failed to stratify the patients prognostically. No. 8 and no. 13a node groupsshould be considered regional nodes in addition to no. 12 node groupsand should be dissected. The number-based regionalnodal classification allows patients with this disease to be stratified prognostically.

Anterior superior pancreaticoduodenal artery pseudoaneurysm after distal pancreatectomy with en bloc celiac axis resection successfully treated with balloon-assisted coil embolization

Bleeding is a fatal complication after pancreatectomy. Although coil embolization is a widely accepted treatment option, ischemia of the remaining organs should be prevented. This study reports the successful treatment of intra-abdominal hemorrhage following distal pancreatectomy with en bloc celiac axis resection (DP-CAR) using balloon-assisted coil embolization (BACE). A 59-year-old man was diagnosed with locally advanced pancreatic cancer. The tumor involves the common hepatic artery, splenic artery, and celiac artery. After four cycles of treatment with gemcitabine/nab-paclitaxel, the soft-density masses, surrounding the artery, shrunk. DP-CAR and R0 resections were performed. A minor postoperative pancreatic fistula occurred. Six months postoperatively, the computed tomography showed delayed asymptomatic bleeding from an anterior superior pancreaticoduodenal artery (ASPDA) pseudoaneurysm located near the gastroduodenal artery confluence. BACE was performed by placing a microballoon catheter in the region of confluence of the ASPDA and posterior superior pancreaticoduodenal artery (PSPDA) to prevent coil migration. After inserting the microballoon catheter, coil embolization was performed in the ASPDA. Hepatic blood flow was maintained from the PSPDA. BACE is a useful technique to preserve blood flow to the remnant organs when performing coil embolization for bleeding following a distal pancreatectomy, especially following a DP-CAR.

S1912 A Rare Case of Recurrent Hemosuccus Pancreaticus

Introduction: Hemosuccus pancreaticus is a rare cause of GI bleeds characterized by intermittent bleeding from the major duodenal papilla. Chronic pancreatitis, via arterial wall necrosis, can form a visceral pseudoaneurysm in 10% of cases. Here is a rare case of recurrent hemosuccus pancreaticus caused by a gastroduodenal artery (GDA) pseudoaneurysm, despite repeated embolization. Case Description/Methods: A 65-year-old man with alcoholic pancreatitis and pancreaticoduodenal pseudoaneurysm status post embolization in 2019 was being evaluated for hematochezia for 6 months. The patient underwent several negative EGDs and colonoscopies. Video capsule endoscopy showed scant blood streaking in proximal small bowel. Initial CT showed an enlarged pancreas with dilated pancreatic duct. EUS showed a 3x2.5cm well-defined cystic lesion at the pancreatic head with an anechoic center with vascular flow. Repeat CT showed a 1.6cm saccular aneurysmal dilation of the superior pancreaticoduodenal artery (SPDA). Prior to follow-up, he was admitted with hematochezia, with his hemoglobin down from 12 to 7.8. EGD showed blood in the second part of duodenum with fresh oozing from ampulla. An aortogram showed a non-bleeding pseudoaneurysm of the GDA, which was successfully embolized. One month later, he presented again with hematochezia. CTA showed a recurrent 1.5cm pseudoaneurysmal dilation of the SPDA and possible lower GI bleed. Colonoscopy showed dark red blood mixed with stool. NM scan showed a slow bleed from left common/internal iliac artery. An angiogram showed extravasation from the GDA, which was embolized along with the recurrent pseudoaneurysm. Seen 45 days after discharge, the patient was asymptomatic (Figure). Discussion: Hemosuccus pancreaticus caused by GDA pseudoaneurysm is reported in less than 2% of population. Successful embolization in the first 6 months is estimated to be 67%, with rebleeding risk at 37%. Rebleeding is thought to be due to collateral vessels, but in this case, no extravasation was seen after each embolization. Our patient developed recurrent symptoms with development of an aneurysm involving the same artery 1 month later. Recurrence or formation of new pseudoaneurysms usually occur within the first 6 months after embolization. This case is unique in that the patient initially had a successful embolization in 2019 of an aneurysm involving the same artery without any bleeding for 2 years, showing that hemosuccus pancreaticus can recur even after the initial 6 month period after a successful embolization.Figure 1.: A: EGD showing bleeding from ampulla. B: Angiogram of celiac trunk with GDA pseudoaneurysm. C: CTA showed 1.5cm saccular pseudoaneurysmal dilatation of the superior pancreaticoduodenal artery. D: EUS showed a 3.4 x 2.5 cm cystic lesion with anechoic center.

S1889 A Case of Ruptured Gastroduodenal Artery Pseudoaneurysms in a Patient With Chronic Pancreatitis

Introduction: Pancreatic pseudoaneurysm is a rare vascular complication of pancreatitis, with an estimated prevalence of 10%. Pseudoaneurysm can result from trauma, inflammation, infection, and iatrogenic causes. Due to its weak structural support, the risk of rupture is higher for pseudoaneurysm than that of a true aneurysm of similar size. Pancreatic pseudoaneurysms can lead to life-threatening complications such as rupture and bleeding, with increased morbidity and mortality up to 90% in untreated patients and 12.5% despite treatment. Due to its high mortality rate with rupture, pseudoaneurysms should be treated immediately once it is identified, regardless of their size or whether it is symptomatic or not Case Description/Methods: We present a case of a 68-year-old male patient with a past medical history significant for chronic pancreatitis who presented with altered mental status and hypovolemic shock secondary to unexplained gastrointestinal and retroperitoneal hemorrhage (Table). Computed tomography (CT) Angiography was done which showed an enlarging retroperitoneal and right-sided intraperitoneal hematoma with suspicion for active arterial extravasation or punctate pseudoaneurysms in the pancreatic head (Figure). Celiac angiogram was done under fluoroscopic guidance, which showed gastroduodenal and superior pancreaticoduodenal artery pseudoaneurysms. He underwent successful endovascular coil embolization of the gastroduodenal artery. Post procedure he was monitored in intensive care unit. His clinical condition continued to improve and was discharged to a skilled nursing facility in stable condition. Discussion: Physicians should be aware of pancreatic pseudoaneurysms as rare vascular complication associated with chronic pancreatitis that may lead to fatal gastrointestinal or retroperitoneal bleeding with a high mortality rate. Our case highlights the importance of early diagnosis and prompt treatment in these patients.Figure 1.: A: CT abdomen and pelvis without intravenous contrast showing peripancreatic inflammation surrounding the pancreatic body and head along with retroperitoneal bleed (red arrow). Pancreatic calcifications present (yellow arrow) signifying radiologic evidence of chronic pancreatitis B: CT Angiography showing retroperitoneal and right-sided intraperitoneal hematoma with active arterial extravasation or punctate pseudoaneurysms in the pancreatic head. Table 1. - Laboratory Investigation Investigation Day 1 of Hospitalization Day 5 At Time of Discharge Reference Range White Blood Cell count 24.3 14.3 k/uL 7 k/uL 4.8-10.8 k/uL Red Blood Cell Count 4.77 2.69 MIL/uL 3.19 MIL/uL 4.50-5.90 MIL/uL Hemoglobin 15.8 8.5 mg/dl 10.2 mg/dl 12.0-16.0 g/dL Hematocrit 47.6 25.7 % 30.5% 42-51 % Platelet count 171 155 k/uL 215 k/uL 150-400 k/uL Sodium, Serum 132 139 mEq/L 140 mEq/L 135-145 mEq/L Potassium, Serum 3.0 3.2 mEq/L 3.9 mEq/L 3.5-5.0 mEq/L Blood Urea Nitrogen, Serum 41 17 mg/ml 10 mg/ml 8-26 mg/dL Creatinine, Serum 1.2 0.5 mg/dl 0.6 mg/dl 0.5-1.5 mg/dL Bilirubin, Serum total 0.5 0.7 mg/dl 0.3 mg/dl 0.2-1.1 mg/dL Serum Direct Bilirubin 0.3 0.3 mg/dl < 0.2 mg/dl 0.0-0.3 mg/dL Alkaline Phosphatase 51 48 units/L 73 units/L 56-155 unit/L Aspartate Transaminase 125 21 units/L 18 units/L 9-48 unit/L Alanine Aminotransferase 81 30 units /L 12 units /L 5-40 unit/L Lactic acid Level 8.2 0.8 mmoles/L 1.1 mmoles/L 0.5-1.6 mmoles/L Prothrombin Time 15.2 13.9 sec 10.5 sec 9.9-13.3 seconds International Normalized Ratio 1.31 1.20 0.92 0.85-1.14 Serum Calcium 6.6mg/dl 7.6 mg/dl 9.2 3 mg/dl 8.5-10.5 mg/dl Serum Lipase 24 U/L < =61U/L Serum Triglyceride 163mg/gl 55-150 mg/dl Serum Ethanol < 10 < = 10mg/dl Urine Toxicology Cocaine and methadone Negative

Rapid identification of source of delayed hemobilia following endoscopic metallic stenting for malignant biliary obstruction.

Delayed hemobilia, a rare but potentially fatal complication of endoscopic metallic stenting for malignant biliary obstruction, requires prompt identification of the source of bleeding and subsequent embolization. However, hemobilia is characteristically intermittent, and computed tomography (CT) often fails to show pseudoaneurysms or extravasations. In particular, because the posterior superior pancreaticoduodenal artery (PSPDA) runs alongside the common bile duct for its whole length, it is readily obscured by metallic artifacts in that duct, such as stents, making identification of the source of bleeding by CT difficult. We have encountered three patients with delayed hemobilia from the PSPDA following endoscopic biliary stenting for malignant biliary obstruction in whom no extravasation or pseudoaneurysms were detected by contrast-enhanced CT during bleeding. However, when we identified that the PSPDA had a smaller diameter than in previous CTs in all three cases, we suspected that the PSPDA was the source of the bleeding. No extravasation or pseudoaneurysms were detected with celiac arteriography or superior mesenteric arteriography; however, extravasation and pseudoaneurysms were detected by direct PSPDA angiography. Hemostasis was achieved through embolization. Detecting a large decrease in the diameter of the PSPDA on contrast-enhanced CT during biliary bleeding may help to identify the source of that bleeding.

Dual-energy CT with virtual monoenergetic images to improve the visualization of pancreatic supplying arteries: the normal anatomy and variations

BackgroundPancreatic ductal adenocarcinoma (PDAC) remains a malignancy with poor prognosis, appropriate surgical resection and neoadjuvant therapy depend on the accurate identification of pancreatic supplying arteries. We aim to evaluate the ability of monoenergetic images (MEI [+]) of dual-energy CT (DECT) to improve the visualization of pancreatic supplying arteries compared to conventional polyenergetic images (PEI) and investigate the implications of vascular variation in pancreatic surgery and transarterial interventions.ResultsOne hundred patients without pancreatic diseases underwent DECT examinations were retrospectively enrolled in this study. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) at 40-keV MEI (+) were significantly higher than those of PEI (p < 0.05). All subjective MEI (+) scores were significantly higher than those of PEI (p < 0.05). The visualization rates were significantly higher for posterior superior pancreaticoduodenal artery (PSPDA), anterior and posterior inferior pancreaticoduodenal artery (AIPDA, PIPDA), anterior and posterior pancreaticoduodenal arcade (APAC, PPAC), transverse and caudal pancreatic artery (TPA, PCA) at 40-keV MEI (+) than those of PEI (p < 0.05). However, there were no significant differences for visualizing anterior superior pancreaticoduodenal artery (ASPDA), inferior pancreaticoduodenal artery (IPDA), dorsal and magnificent pancreatic artery (DPA, MPA) between 40-keV MEI (+) and PEI (p > 0.05). Four types of variations were observed in the origin of DPA and three to five types in the origin of PSPDA, AIPDA and PIPDA.Conclusions40-keV MEI (+) of DECT improves the visualization and objective and subjective image quality of pancreatic supplying arteries compared to PEI. Pancreatic supplying arteries have great variations, which has important implications for preoperative planning of technically challenging surgeries and transarterial interventions.

Relationship of Arterial Changes in Acute Pancreatitis on CT Angiography with Modified CT Severity Index

Abstract Purpose To evaluate the prevalence of arterial changes in patients with acute pancreatitis (AP) on computed tomography angiography (CTA) and determine their association with etiology of AP, presence of necrosis, collections and severity of AP. Materials and Methods A total of 50 patients (20 women, 30 men; mean age: 43.04 ± 13.98; age range: 18–77 years) with AP underwent contrast-enhanced computed tomography (CECT) scan and CTA of abdomen, which was evaluated for necrosis and fluid collection (s). On CTA, splanchnic arterial structures were assessed for vascular complications. Association between vascular changes and presence of necrosis, fluid collections, etiology of AP and severity of AP (as assessed by modified computed tomography severity index CTSI) was determined. Results Arterial complications were seen in 28 percent (14/50). The most frequently involved artery was superior pancreaticoduodenal artery (12 percent), followed by splenic artery (8 percent) and right gastric artery (8 percent; Fig. 1). No significant association was seen between arterial changes and gallstone or alcohol-induced AP. Arterial changes showed a significant association with presence of acute necrotizing pancreatitis (ANP), presence of collections and severe AP (CTSI 8–10) (p &lt; 0.05 for each). Conclusion Arterial changes on CTA are frequently seen in patients of AP having ANP. There is a significant association between arterial changes and presence of necrosis, collections and severe AP.

Pancreatic pseudoaneurysm and its conundrum

Rupture of visceral artery pseudoaneurysm can lead to hypovolemic shock in a patient with pancreatitis. With the advent of minimally invasive treatment techniques most of these can be managed by minimally invasive route and have excellent prognosis when timely intervention is initiated. Herewith, we reported a case of ruptured pseudoaneurysm of superior pancreaticoduodenal artery in a patient with pancreatitis who presented with haematemesis. The patient was successfully managed with coil embolization. A brief case report with review of literature is presented here.

正中弓状靱帯症候群に起因する膵十二指腸動脈瘤破裂を来した5例の臨床的検討(Ruptured aneurysm of the pancreaticoduodenal artery caused by median arcuate ligament syndrome: five case reports)

要旨正中弓状靱帯症候群（median arcuate ligament syndrome: MALS）に起因する膵十二指腸動脈瘤破裂には経カテーテル的動脈塞栓術（transcatheter arterial embolization: TAE）による止血が第一選択とする報告が近年散見される。一方で，TAE後の臨床経過に関する報告は少ない。今回，5例のMALSに起因する膵十二指腸動脈瘤破裂症例を経験し，TAE後の臨床経過を後方視的に検討したので報告する。5例の年齢中央値は58歳（49–78歳），男性4例で，全例でTAEによる止血が行われた。4例は単発症例で1例では多発性に動脈瘤を認めた。TAE後に再出血が生じたのは2例あり，いずれもTAE後約1週間以内に新たな部位に動脈瘤が出現した。追跡期間の中央値は26か月（7～92か月）であるが，正中弓状靱帯切離術を施行された1例を含め，急性期以降は，全例無症状で経過している。MALSに起因する膵十二指腸動脈瘤破裂に対しTAEによる止血を施行した場合は，約1週間以内の早期に新たな動脈瘤形成の危険がある。またその時期を過ぎれば，MALSへの直達手術の有無に関わらず再発や新規の動脈瘤出現の可能性は低く，消化管虚血の症状がなければ保存的に観察できる可能性があると思われた。

Robotic pancreatoduodenectomy for large solid pseudopapillary tumor of the pancreas using precise and systematic vascular control technique

Large tumors in the head of the pancreas pose technical challenges during resection in minimally invasive pancreatoduodenectomy (PD). The precise and systematic vascular control of the pancreaticoduodenal branches of the superior mesenteric artery and vein during robotic PD for a large solid pseudopapillary tumor of the pancreas is described in this video. A 16-year-old female presented with a lump in the abdomen, early satiety, and epigastric pain of 3 months duration. Contrast-enhanced computed tomography abdomen revealed 7.1 × 6.2 cm solid mass with cystic areas in the head of the pancreas. The tumor was compressing the portal vein with dilated pancreaticoduodenal veins. In the present technique, the anterosuperior pancreaticoduodenal vein is controlled first, followed by the superior pancreaticoduodenal artery (by ligating Gastroduodenal artery). This is followed by the control of inferior pancreaticoduodenal veins and arteries. The posterosuperior pancreaticoduodenal vein is ligated at the end to prevent vascular congestion of the uncinate region. The duration of surgery and intraoperative blood loss were 440 minutes and 200 mL, respectively. The patient had an uneventful postoperative course and discharged on the sixth postoperative day. Histopathological examination confirmed the diagnosis of the solid pseudopapillary tumor. At nine months follow-up, the patient remains asymptomatic with no recurrence. A stepwise precise vascular control described in this report could minimize intraoperative bleeding during robotic PD for large tumors in the head of the pancreas.

Anatomy of peripancreatic arteries and pancreaticoduodenal arterial arcades in the human pancreas: a cadaveric study.

The purpose of this work was to evaluate the arteries supplying the pancreaticoduodenal (PD) complex. The study was conducted on 15 fresh enbloc pancreatic specimens by latex injection method which enabled the visualization of the peripancreatic arteries and their minute branches. The gastroduodenal (GDA), anterior superior pancreaticoduodenal (ASPD), and anterior inferior pancreaticoduodenal (AIPD) artery was found in all the cases, whereas the posterior superior pancreaticoduodenal (PSPD) and posterior inferior pancreaticoduodenal (PIPD) artery was present in 93.34% cases. The ASPD artery originated from GDA in all the cases. Two types of variations were observed in the origin of PSPD artery and four types each in the origin of AIPD and PIPD artery. Anatomical and numerical variations were observed in both anterior and posterior arches, posterior arch being absent in 20% cases. In the present study, an attempt was made to systematically describe the individual arterial configurations of the PD complex. The information provided here has important implications for preoperative planning of technically challenging surgeries and interventions around the pancreatic head.

Where Is the Optimal Site for Division of Donor and Recipient Bile Duct for Duct-to-duct Anastomosis During Liver Transplantation?

Background: The blood supply of the bile duct (BD) is a key to minimizing biliary complications (BC) after liver transplantation (LT). Method: A literature review was performed. Results: The retroportal artery (RPA) and 3 and 9 o'clock arteries were first reported by Northover and Terblanche in 1979. They found the RPA in all 21 human resin casts and classified it into two variants; type I RPA arising from the superior mesenteric artery or the Coeliac trunk, and crossing the back of the portal vein to join the posterior superior pancreaticoduodenal artery: and type II RPA which crosses the posterior surface of the supraduodenal BD, and ascends to join the right hepatic artery. They recommended making the donor BD as short as possible. Rath et al described 6 types of marginal arteries of the BD. They suggested dividing both donor and recipient BD just below the confluence of the cystic duct. According to anatomical descriptions of the RPA, which should be included in any description of connective tissue related to the pancreatic head, and contains the BD innervation from the coeliac and superior mesenteric nerve plexuses. Higher division is preferable in order to avoid injury to the recipient RPA and accompanying nerves, which may cause ampullary dysfunction on the recipient. Conclusion: The focus has always been on the donor, but we identify preservation of arterial inflow and innervation of the recipient BD as being important. Deeper consideration and modification of techniques for these small structures may reduce BC after LT.

Arteriovenous malformation in the pancreatic head initially mimicking a hypervascular mass treated with duodenum-preserving pancreatic head resection: a case report

BackgroundThe mainstay treatment for arteriovenous malformation in the pancreatic head (Ph-AVM) is standard pancreatectomy, especially pancreaticoduodenectomy (PD), or interventional endovascular treatment. We report the first case of Ph-AVM treated with duodenum-preserving pancreatic head resection (DPPHR) performed to preserve the periampullary organs.Case presentationA 59-year-old man presenting with back pain underwent contrast-enhanced computed tomography followed by angiography of the anterior superior pancreaticoduodenal artery. He was diagnosed with Ph-AVM and indicated for DPPHR with preservation of the periampullary organs; Ph-AVM’s benign nature seldom requires lymph node dissection. During the operation, the right colon was mobilized and the omental bursa was released to expose the periampullary structures. The pancreas was transected just above the superior mesenteric vein. The inferior pancreaticoduodenal artery and papillary arteries branching from the posterior superior pancreaticoduodenal artery were carefully preserved to maintain the blood flow to the lower bile duct and papilla of Vater. The remnant pancreas was reconstructed with pancreaticogastrostomy using the modified Blumgart method. Pathological examination of the resected specimen revealed an irregular course of the arteries and veins concomitant with marked dilation throughout the pancreatic head. The patient was pathologically diagnosed with Ph-AVM. He developed hematemesis caused by a rupture of the pseudoaneurysm on postoperative day 20 and underwent coil embolization. A bilio-enteric fistula and stenosis of the common bile duct were found and treated by placement of an endoscopic biliary stent. At the 8-month follow-up, the Ph-AVM had not recurred.ConclusionsCompared to PD, DPPHR confers the clinical benefit of preserving the periampullary organs, although further studies are needed to confirm this. Therefore, the choice of this procedure should be based on the surgical morbidities and long-term outcome of the patient.