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Endovascular Approach to Ruptured Sphenopalatine Artery: A Case Report and Literature Review

Article Information

Ram Saha1, Abu Bakar Siddik2, Masum Rahman3, Samar Ikram3, Cecile Riviere-cazaux4, Abdullah Alamgir5, Badrul Alam Mondal6, Quazi Deen Mohammad6, Sirajee Shafiqul Islam7*

1Department of Neurology, Virginia Commonwealth University, VA, USA

2Department of Pain Medicine, Mayo Clinic, Jacksonville, Florida, USA

3Department of Neurological Surgery, Mayo Clinic, MN, USA

4Mayo Clinic Alix school of medicine, Rochester, MN, USA

5Department of Neurosurgery, National Institute of Neurosciences & Hospital, Dhaka,  Bangladesh

6Department of Neurology, National Institute of Neurosciences & Hospital, Dhaka, Bangladesh

7Department of Interventional Neurology, National Institute of Neurosciences & Hospital, Dhaka,  Bangladesh

*Corresponding Author: Dr. Sirajee Shafiqul Islam, Associate Professor, Department of Interventional Neurology, National Institute of Neurosciences & Hospital, Dhaka, Bangladesh

Received: 14 May 2021; Accepted: 25 May 2021; Published: 31 May 2021

Citation:

Ram Saha, Abu Bakar Siddik, Masum Rahman, Samar Ikram, Cecile Riviere-cazaux, Abdullah Alamgir, Badrul Alam Mondal, Quazi Deen Mohammad, Sirajee Shafiqul Islam. Endovascular Approach to Ruptured Sphenopalatine Artery: A Case Report and Literature Review. Journal of Spine Research and Surgery 3 (2021): 037-044.

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Abstract

Epistaxis is a rare complication following the endonasal approach of skull base surgery. Conservative methods like anterior and posterior nasal packing can be useful, but when these fail, a neuro-interventional technique can be used as a last-resort measure in cases of severe bleeding. The authors identify a 22-year-old female patient with recurrent epistaxis following resection of skull-base chordoma through an endonasal approach. An endovascular catheter digital subtraction angiogram identified the cause of epistaxis as a rupture of the left sphenopalatine artery branch of the left external carotid artery. A large dissecting aneurysm in the right intracerebral artery was also incidentally found. The unique co-occurrence of vascular problems was successfully managed by neuro-interventional techniques.

Keywords

Epistaxis, Sphenopalatine Artery, Dissecting Aneurysm, Endovascular, Angiogram

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Article Details

1. Introduction

Skull base surgery poses a somewhat low risk of neurovascular injury regardless of the surgical approach taken, although this is especially true when endoscopy is used. We present a unique case, a young female who has a postoperative course complicated by both a right ICA dissecting aneurysm and a ruptured left sphenopalatine artery after a skull-base chordoma resection. This co-occurrence of vascular complications allows us to explore the topic of neurovascular injuries based on a nasopharyngeal approach. Ensuring adequate hemostasis in skull-base surgeries is extremely important to limit the rate of complications intra-operatively and post-operatively, given the delicate and complex neurological and vascular anatomy at the base of the skull.

Dissecting carotid aneurysms of the internal cerebral artery are extremely rare, occurring in 2.5 to 3 people out of 100,000 [1-3]. However, they are a common cause of cerebral infarction in patients younger than 40 years old [3, 4]. One study has found that dissecting intracranial aneurysms of non-traumatic origin are more common than previously expected [5]. The exact etiology behind dissecting ICA aneurysms is unknown, although these have been linked to trauma and underlying arterial pathologies, causing a sudden tear in the intimal layer of the artery [3, 6]. These dissecting aneurysms most commonly occur in the extracranial portion of the ICA rather than the ICA (70 to 80% of cases), and they are associated with vertebral artery dissection in up to 20% of cases [3, 4]. The typical presentation of this is an ipsilateral headache or neck pain, delayed ischemic symptoms from the affected hemisphere or retina, Horner’s syndrome, lower cranial nerve palsies, and pulsatile tinnitus [2, 3]. The prognosis is unpredictable, with death occurring following neurological sequelae in 15% of cases [3].

Most epistaxes originate in the area of Kiesselbach and do not require as aggressive of an intervention. However, in 10% of cases, these bleeds originate in the posterior nasal area, including the sphenopalatine artery (SP artery), and require more serious methods of management [7, 8]. Traditional methods of cauterization and packing are often highly unsuccessful in cases such as these. Sphenopalatine arterial electrocoagulation has been found to be an effective way of stopping these bleeds [9], and endoscopic control of the SP artery via ligation has been successful in controlling significant epistaxis of the posterior nasal area [8, 10].

In regards to endoscopic skull-base surgery, in a cohort of 330 patients, 3% of patients experienced postoperative epistaxis, most of which were resolved by nasal packing [11]. Thus, we hope that this unique co-occurrence of two vascular abnormalities will allow us to explore the topic of neurovascular complications in skull-base surgeries, especially in regard to managing dissecting carotid aneurysms and endovascular approaches to sphenopalatine arteries.

2. Case Report

A 22-year-old female was referred to the Department of Neuro-intervention from the department of neurosurgery for evaluation of recurrent nasal bleeding following surgical excision of a skull-base chordoma through the endonasal approach. An endovascular catheter digital subtraction angiogram was performed through a right femoral puncture. Her right intracranial artery injection revealed a large dissecting aneurysm (16mm in length by 11mm, 3 mm wide at its neck) at the cavernous segment. Injection of her left extracranial artery demonstrated active bleeding from multiple branches of the spheno-palatine artery of the branch of the left maxillary artery. A digital occlusion test was performed by compressing the right common carotid artery (CCA) and the anterior communicating artery (AcomA) was patent, sufficiently supplying the contralateral right anterior circulation. After this discovery, the following procedures were performed to manage these findings:

Procedure 1: A 6F Envoy guiding catheter was placed at the horizontal petrous segment of the RICA. A microcatheter (Echelon 10, ev3, USA) over the micro guidewire (Traxcess .014”, Microvention, USA) was navigated by guiding the catheter into the large aneurysm. A detachable GDC coil (16mmx30cm, Stryker, USA) was deployed into the aneurysm and a distal loop was left at the neck.

Procedure 2: the 6F Envoy guiding catheter was then placed at the left external carotid artery (LECA). A microcatheter (Echelon 10, ev3, USA) over the micro guidewire (Traxcess .014”, Microvention, USA) was navigated by guiding the catheter into the sphenopalatine artery. A 25% (NBCA + lipiodol) emulsion was then injected slowly through a microcatheter by a 1cc syringe. This was withdrawn once there was adequate embolization to stop the bleeding.

7 days after this procedure, a new angiogram showed that the RICA dissecting aneurysm was almost completely embolized. The nasal bleeding had stopped as well. The patient’s general condition was improved enough to be discharged home and she was advised for a follow-up visit and appointment with a neuro-oncologist.

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Figure 1A: angiography of right internal carotid artery showed a dissecting aneurysm at cavernous segment.

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Figure 1B: Bleeding per left sphenopalatine artery revealed by angiogram. Contrast is passing the tissue.

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Figure 2A: After seven days of coiling check angiogram showed the dissecting aneurysm was almost embolized.

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Figure 2B: Post embolization by NBCA liquid embolic agent. Injection showed no bleeding point.

3. Discussion

Chordomas are a rare form of cancer belonging to the sarcoma family affecting 1 in a million individuals per year. It is a slow growing, locally invasive tumor, commonly arising from remnants of the notochord [12, 13]. Our patient suffered from a skull base chondroma and an endonasal approach was used for tumor resection. Outcomes, such as tumor recurrence or complication rates are directly related to the expertise of the skull base surgeon and the team [14]. Epistaxis after endoscopic skull base surgery is a frequent complication, with devastating consequences due to hemorrhage. Post-operative epistaxis remains a common finding and the patient is at risk of deteriorating from hemorrhage. Like our patient, bleeding from large-caliber vessels such as the sphenopalatine and carotid artery is frequently seen. After anterior nasal packing alone was unsuccessful, our patient was injected with a 25% (NBCA + lipiodol) emulsion through a microcatheter using a 1cc syringe. NBCA is a vinyl monomer of alkyl 2-cyanoacrylate family that polymerizes on contact with ionic solutions such as normal saline, contrast dye or blood. When used in its purest form, polymerization is immediate. Addition of Ethiodol oil increases viscosity, prolonging polymerization duration, yet still providing necessary radiopacity for monitored administration using x-ray guidance. The ratio of NBCA Glue to Ethiodol is dependent on lesion type, degree of bleeding, flow characteristics of the vessel to be embolized and transit time from catheter tip to target [15, 16]. Vessel perforation during microcatheter placement is a common complication and can be reduced using a  flow-directed microcatheter [16].  Injecting the mixture slowly also prevents risk of venous occlusion, and it is imperative that skilled personnel administer the mixture.

The use of a NBCA glue for endovascular management is relatively new with only a few cases reported in literature. Using the NBCA glue is a fast, easy technique and helps avoid multiple catheter manipulation when only one vessel needs to be embolized. In higher concentrations, it provides adequate sealing of larger blood vessels, with minimal risk of penetration into arterioles [17]. A 2004 study published in the Journal of Vascular Surgery studying the effects of NBCA for control of acute arterial hemorrhage reports that NBCA embolization was able to stop arterial bleeding in patients where previous coiling or particulate embolization had failed [18]. Furthermore, a 2017 study studying the efficacy of pre-embolizing a meningioma using a 13% dilute NBCA-lipiodol mixture noted that 56% (18 cases) of patients experienced a 50% reduction of T1-weighted MR imaging (T1-W1), further reflecting the therapeutic benefits of using an NBCA-lipiodol mixture for embolization [19]. Our patient did not experience any recurring bleeding after the procedure which used NBCA, and her follow-up visit after 7 days was unremarkable. Our patient’s case is unique because not only did her angiogram reveal a ruptured sphenopalatine artery, but a large dissecting aneurysm at the cavernous segment was also present. The presence of two vascular abnormalities made it challenging to operate surgically and required skilled expertise to navigate through its management. The increased use of imaging techniques in clinical practice have led to a higher detection rate of intracranial aneurysms, and dissection of the extracranial portion of the internal carotid artery is most frequently reported [20]. A commonly accepted classification of aneurysms is small (4-10 mm), large (10-25 mm) and giant (> 25 mm).

The most challenging aneurysms to treat include wide neck dissecting aneurysms, like the one our patient had [21]. Her aneurysm measured 16 x 11 x 3 mm and was treated using the Guglielmi detachable coil (GDC) embolization method. Inserting coils within the aneurysm halts blood flow, preventing further hemorrhage through the weakened vessel wall. This method supersedes surgery due to ease with which the platinum coil is inserted. Common practice involves using the transfemoral approach under general anesthesia [21]. The GDC coil is platinum and its malleable property allows it to effortlessly deform within the aneurysm. Over the last decade, advancements in GDC technology have also improved this method of treatment. Surgeons now have a variety of coil sizes to use and multi-dimensional coils for safer placement are also available [21]. A 2006 article looking into the safety of coil embolization reported a low complication risk during surgery, ranging between 8-18% compared to surgical clipping which had an overall risk of 23% [22]. Furthermore, the study reports a 3% reduction in morbidity among those who underwent coil embolization compared to surgical clipping over a course of 7 years. The survival benefit remained consistent over time with a log-rank of p=0.03 [22]. Notably, the outcome of coil embolization is independent of age for both ruptured and unruptured aneurysms, whereas surgical clipping indicated a better prognosis in patients > 65 years of age [22]. However, it is important to note that long term angiographic evidence in regards to long term occlusion and recurrence status with GDC use is lacking, and while surgical clipping has high procedural risks, its long term benefits have been well established in literature. Common complications of coil embolization include thrombo-embolic events (2.5-14.5%), coil malposition (14.6%) and coil collapse (8%) [21].

Furthermore, morphology of the aneurysm and its location also play a pivotal role in determining long term therapeutic benefits of coil embolization [21]. A review article published in JAMA Neurology recommends using a dome-to-neck ratio when using embolization coils [21]. According to Dovey et. al, it is mathematically logical to deduce that a small neck aneurysm with a width < 5 would be easier to pack than a wide neck. Furthermore, the study states that embolizing with GDC is relatively more challenging in aneurysms < 4 mm and  less efficacious in aneurysms > 10 mm [21]. In their study, patients with a dome-to-neck ratio of < 2 had a 58% occlusion rate whereas those with a ratio of > 2 demonstrated an 80% occlusion rate using GDC [21]. With a rare tumor occurrence, multiple vascular abnormalities and risk of life-threatening hemorrhage, our patient’s condition was critical. Based on our patient’s age, risk factors and radiological results, we aimed to provide her with a treatment offering maximal therapeutic benefit and with this case report, we hope to share our insight with those who may be faced with similar challenges. 

4. Conclusion

Bleeding from the sphenopalatine artery and dissecting aneurysm of an intracranial artery following endonasal resection of chordoma is an infrequent complication. Early diagnosis and adequate neuro-interventional techniques, like GDC coiling and embolization, can appropriately manage those conditions. We recommend early imaging and prompt neurological intervention for persistent nasal bleeding following endonasal resection of tumors in cases when more conservative techniques are not sufficient for controlling epistaxis.

Conflict of Interest

All authors declare no conflict of interest.

Disclosures

The authors have no financial conflicts of interest to declare.

Human/Animal Rights

Patient provided informed written consent to use the any relevant information for research and publications. 

Acknowledgments

We want to acknowledge and thank CMSR (center for medical study and research) foundation.

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