Marvin Elston Morris

Baystate Medical Center · Department of Surgery

Background During the COVID-19 pandemic, cardiovascular patients were found to be presenting to hospitals with myocardial infarctions and cerebrovascular accidents at progressed disease states. We noticed a parallel in acute limb ischemia (ALI) patients presenting during Massachusetts’ COVID-19 State of Emergency declaration. We question whether pa...

Despite recent publications indicating billowing (aneurysmal degeneration of the outer fabric material manifesting as a bulging sac of contained contrast due to weakening of the fabric material between the metal struts) as a benign finding, we present a unique case of billowing that resulted in aneurysmal rupture with the AFX2® stent-graft (Endolog...

We present an atypical manifestation of chronic mesenteric ischemia in a patient with progressively worsening exertional abdominal pain. Imaging modalities revealed significant isolated stenosis of superior mesenteric artery. Successful angioplasty and stenting of superior mesenteric artery relieved patient's symptoms, thereby confirming the diagno...

Background: Eversion endarterectomy (EE) is a well described technique for the treatment of extra-cranial cerebrovascular disease. Longitudinal arteriotomy and closure with patch angioplasty is the standard for infra-inguinal arterial occlusive disease in the iliofemoral segment. A potential drawback of this technique is the introduction of exogen...

Traumatic celiac artery injuries are rare and highly lethal with reported mortality rates of 38–62%. The vast majority are caused by penetrating trauma with only 11 reported cases due to blunt trauma (Graham et al., 1978; Asensio et al., 2000, 2002). Only 3 of these cases were complete celiac artery avulsions. Management options described depend up...

Adipose-derived stromal vascular fraction cell populations are being evaluated for numerous clinical applications. The current study evaluated a point of care (POC) technology, the Tissue Genesis "TGI 1000" Cell Isolation System™, to perform an automated isolation of adipose-derived stromal vascular fraction cells to be used in the fabrication of a...

Acquiring sufficient amounts of high-quality cells remains an impediment to cell-based therapies. Induced pluripotent stem cells (iPSC) may be an unparalleled source, but autologous iPSC likely retain deficiencies requiring correction. We present a strategy for restoring physiological function in genetically deficient iPSC utilizing the low-density...

Vasoactivity, an important aspect of tissue healing, is often compromised in disease and tissue injury. Dysfunction in the smaller vasoactive arteries is most impactful, given the role of these vessels in controlling downstream tissue perfusion. The adipose stromal vascular fraction (SVF) is a mix of homeostatic cells shown to promote tissue healin...

Adipose derived stromal vascular fraction (SVF) cells have been shown to self-associate to form vascular structures under both in vitro and in vivo conditions. The angiogenic (new vessels from existing vessels) and vasculogenic (new vessels through self-assembly) potential of the SVF cell population may provide a cell source for directly treating (...

Gestational complications in pregnant women have been considered a theoretical sequelae of vena cava filters (VCFs) positioned in the infrarenal segment of the inferior vena cava. We describe a 32-year-old woman who became pregnant with the known existence of an asymptomatic but chronically perforated, permanent infrarenal VCF. At 24 weeks gestatio...

The relatively few therapeutic options for treating small vessel disease creates a significant clinical challenge. The stromal vascular fraction (SVF) derived from adipose tissue is a rich source of regenerative cells shown to have anti-inflammatory and vascular reparative capabilities. We explored the ability of these SVF cells to reverse vascular...

Objective Critical limb ischemia (CLI) is a challenging clinical entity complicated by chronic microvascular disease. Stromal vascular fraction (SVF), a heterogeneous population of cells derived from adipose tissue, has garnered interest as a means of an autologous cell-based approach to vasculogenesis in these patients. The SVF concentration neede...

Neurofibromatosis type 1 is the most common inherited disorder of the nervous system, affecting approximately 1 in 3,000 people. A small but significant subset of these patients develop vasculopathies. We present the first reported case of neurofibromatosis type 1 presenting with obstructive jaundice secondary to multiple hepatic artery aneurysms....

Meningococcal sepsis and purpura fulminans is a rare but highly lethal disease process that requires a multidisciplinary team of experts to optimise morbidity and mortality outcomes due to the breadth of complications of the disease. The surgical perspective involves the critical care management which utilises all currently available measured outco...

The ruptured hypogastric artery aneurysm (RHAA) is a rare clinical entity with an evolving and dynamic therapeutic armamentarium. The anatomical location and varied clinical presentation can pose a challenge for successful repair. Recently, endovascular and hybrid operative repairs have significantly improved the historically high-operative mortali...

Ehlers-Danlos syndrome (EDS) represents a group of inheritable connective tissue disorders. Patients with type IV or vascular EDS, autosomal dominant pattern of inheritance, may present with aneurysm formation or arterial dissection. Due to vessel fragility, operative therapy for such disorders has been reserved for compelling indications in which...

Les thrombus muraux thoraciques (TMT) sont rares mais une source importante d'emboles distaux. Les options de traitement sont variées, allant de la chirurgie ouverte, à l'endovasculaire, et au traitement conservateur. Nous rapportons deux cas de TMT, un traité avec succès par stent de l'aorte thoracique pour embolisation viscérale et périphérique,...

Thoracic mural thrombi (TMT) are rare but an important source of distal emboli. Treatment options are dynamic, ranging from open, endovascular to conservative therapies. We report two cases of TMT, one successfully treated with thoracic aortic endoluminal stent placement for visceral and peripheral embolization, the second treated conservatively fo...

The role of carotid artery stenting (CAS) as an alternative to carotid endarterectomy for the treatment of extracranial carotid occlusive disease for stroke prevention continues to evolve. Although technical and device refinements aimed at making CAS safer continue to this day, safety as measured by 30-day and 1-year outcomes has been the primary r...

The role of carotid artery stenting (CAS) as an alternative to carotid endarterectomy for the treatment of extracranial carotid occlusive disease for stroke prevention continues to evolve. Although technical and device refinements aimed at making CAS safer continue to this day, safety as measured by 30-day and 1-year outcomes has been the primary r...

L'association d'un anévrysme de l'aorte abdominale inflammatoire et d'un rein en fer à cheval est rare avec un seul cas rapporté dans la littérature. Nous présentons un cas de rein en fer à cheval associé à un anévrysme de l'aorte abdominale inflammatoire de 6 cm et à un gros anévrysme de l'artère iliaque droite de 3,6 cm réparés par voie transpéri...

The combined presence of an inflammatory abdominal aortic aneurysm and a horseshoe kidney is a rare event with only one reported case in previously published data. We present a case of a horseshoe kidney with a concomitant 6-cm inflammatory abdominal aortic aneurysm and a 3.6-cm right iliac artery aneurysm repaired through a transperitoneal approac...

Nous rapportons le cas d’un homme âgé admis avec des douleurs abdominales et la fièvre 5 mois après la réparation endovasculaire d’un anévrysme de l’aorte de l’aorte abdominale suspect d’être inflammatoire. Un stentgraft infecté avec fixation supra-rénale était explanté après revascularisation extra-anatomique. Après une hospitalisation prolongée,...

L’évolution des techniques endovasculaires a étendu l’arsenal thérapeutique à disposition dans la prise en charge de l’artère sous-clavière droite aberrante. Nous décrivons ici une technique hybride associant la mise en place d’un plug Amplatzer à la confection d’un pontage carotido-sous-clavier pour le traitement d’un patient atteint de dysphagia...

We report a case of an elderly man admitted with abdominal pain and fever, 5 months after endovascular aortic aneurysm repair of a suspected inflammatory abdominal aortic aneurysm. He underwent successful explantation of an infected stent graft with suprarenal fixation following extra-anatomic revascularization. After a prolonged hospitalization, h...

Emerging technology with endovascular techniques has expanded our armamentarium to treat the aberrant right subclavian artery. We describe a hybrid technique using an Amplatzer plug in combination with a carotid subclavian bypass to treat a patient with dysphagia lusoria.

The success of vascular intervention including angioplasty, stenting, and arterial bypass remains limited by negative remodeling resulted in lumen restenosis. This study was to characterize the global transcription profile reflecting concurrent events along arterial remodeling and neointima formation in a rat carotid artery balloon-injury model. Ex...

Introduction: The performance of synthetic bypass grafts to tibial level outflow arteries is greatly limited by early thrombosis and intimal hyperplasia. In addition to its anticoagulant effect, thrombomodulin (TM), an endogenous thrombin inhibitor, also displays anti-proliferative and anti-migratory effects on vascular smooth muscle cells. In this...