Current management strategies for visceral artery aneurysms: an overview

Unusual case of upper gastrointestinal haemorrhage secondary to a ruptured gastroduodenal artery pseudoaneurysm: case presentation and literature review

Pseudoaneurysm rupture of the gastroduodenal artery (GDA) is life-threatening and can present as an acute upper gastrointestinal haemorrhage. Here, we present a case of upper gastrointestinal haemorrhage arising from a ruptured GDA pseudoaneurysm. A 56-year-old woman presented acutely with haematemesis. She reported ongoing upper epigastric pain for a few weeks. Laboratory evaluation revealed severe microcytic hypochromic anaemia (haemoglobin, 69 g/L; normal, 120-140 g/L) and a mildly raised serum amylase level. Upper gastrointestinal endoscopy revealed dark blood collection between the rugae of the distal stomach. An abdominal CT scan detected a homogeneously enhancing rounded lesion arising from the GDA adjacent to the second part of the duodenum. The median arcuate ligament was causing stenosis of the coeliac axis origin. The diagnosis of haematemesis secondary to a ruptured GDA pseudoaneurysm was confirmed by mesenteric angiography, and aneurysmal embolisation was done. The haemoglobin level stabilised after aneurysmal embolisation.

A systematic review and meta-analysis of the performance of flow-diverting stents in the treatment of peripheral and visceral artery aneurysms

OBJECTIVE

This meta-analysis aims to evaluate the safety and efficacy of flow-diverting stents (FDS) in treating peripheral and visceral artery aneurysms (PAA/VAAs).

BACKGROUND

Though rare, PAA/VAAs can represent a life-threatening condition due to their propensity of rupture. The FDS emerges as a new solution to exclude these aneurysms while maintaining collateral branches, but convincing evidence is lacking on its clinical effectiveness.

METHODS

A systematic literature search was performed to identify studies related to FDS in treating PAA/VAAs. The preferred reporting items for systematic reviews and meta-analyses (PRISMA) statement was applied to guide the data extraction, quality assessment, and synthesis of outcomes of interest. Random effect models were applied to calculate the event rates of major endpoints. OpenMeta[Analyst] software was used for statistical analysis.

RESULTS

Of 130 records screened, 10 cohort studies (including 220 patients, average age: 66.0 years, 78.4% male) were enrolled in the meta-analysis. Pooled data suggested a technical success rate of 98.5% (95% CI: 97.0-100%). During a mean follow-up period of 14.1 months, 93.6% (95% CI: 88.6-98.5%) side branches remained patent, 89.8% (95% CI: 84.3-95.3%) aneurysms were totally thrombosed, whereas shrinkage/stabilization of the aneurysm was documented in 93.4% (95% CI: 88.4-98.4%) cases. The primary stent patency rate was estimated to be 87.9% (95% CI: 81.0-94.8%). Overall clinical success was achieved in 83.2% (95% CI: 74.4-92.0%) patients.

CONCLUSIONS

The FDS features a potential advantage of preserving side branches while inducing sac thrombosis and aneurysm shrinkage/stabilization. Further prospective, comparative studies in larger patient cohorts are anticipated to draw a robust conclusion.

A Unique Case of Severe Hematochezia: Ruptured Pseudoaneurysm of the Superior Rectal Artery

Visceral artery aneurysms are rare, with an incidence of 0.01%–2% based on autopsy results. Among the visceral arteries, inferior mesenteric artery aneurysms are the rarest. To our knowledge, we report the first case of acute lower gastrointestinal bleeding in a 45-year-old man, arising from a nontraumatic pseudoaneurysm of the superior rectal artery, a branch of the inferior mesenteric artery. Urgent angiography provided the diagnosis and allowed successful hemostatic intervention via endovascular coil embolization. A subsequent routine colonoscopy revealed an ulcer with central yellow-bluish bulge in the distal rectum correlating with the site of the treated pseudoaneurysm.

Endovascular repair using a covered stent for a ruptured infected aneurysm of the superior mesenteric artery after pancreaticoduodenectomy: a case report

BACKGROUND

Delayed arterial hemorrhage after pancreaticoduodenectomy is a life-threatening complication. There are no reports about infected aneurysms of the superior mesenteric artery after pancreaticoduodenectomy without clinically relevant pancreatic fistula.

CASE PRESENTATION

A 78-year-old woman with borderline resectable pancreatic ductal adenocarcinoma involving the superior mesenteric arterial nerve plexus underwent pancreaticoduodenectomy with en bloc resection of the superior mesenteric vein and the superior mesenteric arterial nerve plexus after neoadjuvant chemotherapy. On postoperative day 14, she had bacteremia and sudden fever with chills. During the postoperative course, macroscopic abscesses or distinct infectious signs, including pancreatic fistula or bile fistula, were not present, but pylephlebitis was observed. After the antimicrobial treatment course, the patient was discharged. After 17 days, she was hospitalized for melena. Contrast-enhanced computed tomography showed a ruptured aneurysm of the superior mesenteric artery into the small intestine without a major intraabdominal abscess. E. coli was isolated from blood cultures. The patient was diagnosed with a ruptured infected aneurysm of the superior mesenteric artery. She was treated successfully with a covered stent by the cardiology team. There was no recurrence of bleeding at the 4-month follow-up, and the stent was patent in all subsequent computed tomography scans.

CONCLUSIONS

Endovascular repair using a covered stent was effective in palliating acute bleeding from an infected aneurysm of the superior mesenteric artery.

Inferior epigastric artery pseudoaneurysm secondary to port placement during a robot-assisted laparoscopic radical cystectomy

Pseudoaneurysm occurs when the artery wall is damaged and the blood is contained by the surrounding tissues with the eventual formation of a fibrous sac communicating with the artery. We report a case of a 74-year-old man with inferior epigastric artery (IEA) pseudoaneurysm secondary to an 8-mm port placement during a robot-assisted laparoscopic radical cystectomy with ureteroileocutaneostomy. The pseudoaneurysm was initially diagnosed by contrast-enhanced ultrasound (CEUS); subsequently, a computed tomography (CT) scan and an angiography test were performed. The pseudoaneurysm was then treated successfully with embolization of the inferior epigastric artery. Awareness of this rare complication is of clinical importance to avoid excessive morbidity of affected individuals.