Resection and immediate reconstruction of a pediatric vascular malformation in the mandible: Case report

Management of intra-osseous arteriovenous malformations of the mandible

Intra-mandibular arteriovenous malformations (IM-AVM) are rare congenital lesions sadly known by the appearance of cataclysmic haemorrhages. It represents a therapeutic challenge which requires a multidisciplinary approach. This paper aims to evaluate the characteristics and management of IM-AVM through the illustration of six case reports, the largest serie in the literature to our knowledge. This retrospective study included all patients with IM-AVM treated in the hospital of Lyon and Saint-Etienne between 1982 and 2021, in France. The management of mandibular AVMs should be individualized and permanently adjusted according to their stage of development, which makes their management difficult. Furthermore, long-term follow-up is essential to detect and manage the subclinical progression of the lesion. Based on these results and a systematic review of the literature, an algorithm has been developed to guide the treatment strategy for this are pathology.

Systematic review of pediatric mandibular arteriovenous malformations

OBJECTIVES

The management of arteriovenous malformations (AVMs) can be challenging in the pediatric population. It is of utmost importance to keep in mind various management options as these lesions can have disastrous outcomes. This is a systematic review of the treatment AVMs describing the current practices so that practitioners can be aware of what is currently reported in the literature. The challenges of AVM management can be mitigated when approaching these patients through a multidisciplinary team-based approach.

METHODS

A systematic review of the literature was performed using the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines to gain insight into pediatric mandibular AVMs. Demographics, arterial involvement, clinical symptoms, imaging, treatment, complications, follow-up, and outcomes were reviewed.

RESULTS

63 articles were included in the systematic review with 106 distinct cases. The age range was from 3 to 17 years with a mean of 12 years. 51% of the patients were female. The most common clinical presentation was emergency hemorrhage (37.4%), swelling or edema (33.0%), and persistent bleeding (31.9%). The most common CT findings were osteolytic changes and radiolucencies (60.8%). With regards to treatment, 56.6% of patients had embolization alone and 34.9% were treated with embolization in combination with other surgical treatments. Of the patients who had surgical resection of the lesion, 50% had resection followed by reconstruction, 23.7% had curettage of the lesion, and 13.2% had resection/curettage then immediate reimplantation of the mandible segment. The most common complications after intervention included bleeding in 17.9% of patients and infection in 8.3% of patients. 89.5% of patients were clinically cured without recurrence at follow-up.

CONCLUSION

Diagnosing AVMs can be difficult as they have variable clinical and radiographical presentations. Although rare, because of risk of massive hemorrhage, it is important for healthcare professionals to be aware of this pathology. Many surgical techniques, routes of embolization, embolic material, and other experimental therapies have been described and this review shows that the most cases had embolization as a part of the treatment. The role of therapies targeted at the molecular level still needs to be further explored.

Management of vascular malformations in the Oral and maxillofacial region: A systematic review

OBJECTIVE

The purpose is to determine the comprehensive review and the current concepts on the management of vascular malformation and to evaluate the long term outcomes, recurrence and complication rate.

METHODS

This systematic review followed PRISMA guidelines and registered in PROSPERO (CRD42020173735). The PUBMED, EBSCO, SCOPUS and NDH databases were used to perform a comprehensive search of articles published up until July 2020. The database search identified 1719 articles. After an intricate review, 34 studies were estimated for eligibility.

RESULTS

A total of 1719 patients with mean age of 27.48 years were treated for vascular malformation in the oral and maxillofacial region. Moderate heterogeneity was observed for the outcome (P = 0.166; 95% CI:1.01-1.46, I² = 48%). As determined by one-way ANOVA, there was no statistically significant difference between the type of diagnosis and the recurrence (F = 2.313, p = 0.092) and the complication rate (F = 2.112, p = 0.117).

CONCLUSION

In accordance with the available scientific literature, this review has highlighted the modalities and advancement in the management of vascular malformations. Complications and recurrence were reported in all types of management. It can be avoided by careful diagnosis, pre-operative assessment and treatment planning.

Primary free fibula reconstruction in life-threatening haemorrhage from high flow arteriovenous malformation of mandible

Background:

High flow arteriovenous malformation (AVM) of the mandible is rare, but it can present as a life-threatening emergency with severe intraoral bleeding for the first time. The gold standard of treatment for an AVM of the mandible is selective embolisation combined with resection and subsequent reconstructions. With the advent of advanced multidisciplinary techniques aimed at definitive therapy, surgical resection and primary reconstruction can provide an ideal anatomical and functional cure. There are no previous reports on primary resection and reconstruction for life-threatening haemorrhage from high flow AVM of the mandible.

Aim:

We discuss our approach aimed at definitive therapy in life-threatening intraoral bleeding from large high flow AVM of the mandible.

Subjects and Methods:

Four patients were managed for life-threatening intraoral bleeding during 2015–2017. Compression was applied over the bleeding point before the airway could be secured by endotracheal tube. Under general anaesthesia, the external carotid artery (ECA) was temporarily occluded using an umbilical tape loop ligature to control the bleeding. Emergency selective embolisation was done, followed by curative resection and primary mandible reconstruction using free fibula flap. Outcome assessed.

Results:

Temporary occlusion of the ECA successfully controlled the bleeding immediately and facilitated selective embolisation and definitive therapy. All the four cases were successfully reconstructed with a good outcome. There was no recurrence during the follow-up period.

Conclusion:

In life-threatening intraoral bleeding from large high flow AVM of the mandible, emergency selective embolisation followed by curative resection and primary reconstruction is safe in achieving an ideal cure.

Great Radiologic Imitators: Arteriovenous Malformation of Mandible - A Case Series

An arteriovenous malformation (AVM) is a vascular malformation characterized by anomalous communications between arteries and veins without the normal intervening capillary bed. AVMs of jaw are extremely rare conditions that can give rise to dreadful complications if handled carelessly. Fifty percent of all intraosseous AVMs occur in the maxillofacial region and are extremely infrequent in the mandible. Only six cases of extraosseous submandibular AVMs have been mentioned in the literature. Three cases of AVMs involving the mandible, with a massive case involving both the mandible and submandibular region is reported. To the best of our knowledge, only one case is documented as a combined AVM involving both the mandible and submandibular region in literature.

Embolization as the Primary Treatment for Mandibular Arteriovenous Malformations: An Analysis of 50 Literature Reports and of an Illustrative Case

PURPOSE

The aim of the present report is to describe 50 cases in the literature of mandibular arteriovenous malformations (AVMs) in which embolization was the primary treatment and to discuss details such as age, gender, materials used, outcome of embolization, time of follow-up, and intra- or postprocedure complications. An illustrative case in which reossification was noticed after embolization also is presented.

PATIENTS AND METHODS

The study was carried out in 2 steps. In the first, an electronic search without time restriction for embolization as the primary treatment for mandibular AVMs was performed on Medline through PubMed. In the second, the case of a patient with mandibular AVM and massive oral bleeding episodes is described after a long-term follow-up.

RESULTS

Clinical stability with the cessation of oral bleeding episodes was detected in 25 cases and 2 cases were planned for another embolization session. Clinical stability and reossification were detected in 23 of the 50 cases included. Complications were reported in 50% of cases, but most were minor and transient.

CONCLUSION

Currently, owing to more sophisticated imaging techniques, the diagnosis of mandibular AVMs is quicker and new, less invasive techniques that avoid surgical resection have proved effective. It should be emphasized that these techniques are not without complications and that long-term monitoring is extremely important.

Massive bleeding after a tooth extraction: Diagnosis of unknown arteriovenous malformation of the mandible, a case report

•

Mandibular arteriovenous malformation (AVM) are very unusual condition.

•

They remain frequently undiagnosed until a severe bleeding occurs during an oral surgical procedure.

•

This case was a real diagnostical challenge: clinical presentation and initial radiographic examination was atypical.

•

Curently there is no guideline to manage this kind of pathology.

Introduction

Arteriovenous malformations (AVMs) are very rare. Only 5% of them occurs in the jaws but they can manifest with dramatic bleeding and be life-threatening.

Presentation of case

We report the case of a 11-year-old healthy girl who presented a massive hemorrhage after extraction of the right mandibular first primary molar. This patient received a blood transfusion and was hospitalized in pediatric intensive care unit. CT angiography highlighted an AVM of the mandible. Treatment consisted in selective embolization.

Discussion

A review of the literature shows that the majority of AVMs of the jaws are often unknown until severe bleeding occurs during dental surgery. The low specificity of radiological signs on panoramic radiography makes the diagnosis particularly challenging. Their management requires an interdisciplinary approach. Selective embolization has a place of choice in the treatment of these complex pathologies.

Conclusion

Although AVMs of the jaws are rare, they are frequently revealed through a massive hemorrhage during tooth extraction. Dentists have to suspect them when young patients present some clinical features, as spontaneous gingival bleeding, unexplained dental mobility, or facial asymmetry.

High-flow paediatric mandibular arteriovenous malformations: case reports and a review of current management

High-flow vascular malformations in the paediatric population are potentially life-threatening and are challenging to treat. This paper describes the management of three cases of mandibular arteriovenous malformations and reviews the contemporary management options for these serious lesions.

Arterio-venous malformation of the mandible. Case report and review of literature

Arteriovenous malformation (AVM) of the head and neck is a rare and potentially life threatening entity due to massive haemorrhage. There are several indications for treatment, including age of the patient and location, extent and type of vascular malformation. Endovascular therapy can effectively cure most lesions with limited tissue involvement. Surgery can be used in selected cases in combination with embolization. Here we report the case of a young woman affected by a massive AVM on the left side of the mandible and submandibular region, and also review the literature on AVM with special attention to treatment strategies.

Comprehensive treatment and rehabilitation of a patient with maxillary arteriovenous malformation

Arteriovenous malformations (AVMs) of the maxilla are rare and potentially life-threatening conditions that can pose a therapeutic dilemma. We reported the first case of maxillary AVM in a 15-year-old girl who was treated by marginal hemimaxillectomy including overlying palatal mucosa and immediate replantation of the segment after removing the AVM tissues and teeth and covering by a full-thickness pedicled temporal muscle flap rotated into the mouth. Then, this preserved bone underwent distraction osteogenesis and dental implant rehabilitation successfully. This method was previously used for the definitive treatment of mandibular AVMs, and in this case, we applied this method for the first time in maxillary AVMs. In conclusion, this surgical method may be considered as a safe, convenient, and effective treatment and reconstructive modality for such vascular malformations in the maxilla and restores function and symmetry of the jaws while obviating the need for bone harvesting and future major reconstructive operations.

Extensive bilateral arteriovenous malformations of the mandible successfully controlled by combined endovascular and transcutaneous angio-embolization: case report and review of the literature

We report a unique case of extensive bilateral arteriovenous malformation (AVMs) in a child's mandible, discuss treatment options and review literature. A healthy 8 year-old girl presented with bright blood of unknown source found on her pillow. Three large AVMs involving the symphyseal region and bilateral mandibular bodies were found on angiography. Due to the extent of surgical resection required, the patient underwent a series of endovascular and transcutaneous angio-embolization. In cases of extensive intraosseous AVMs, serial embolization procedures can be successful in controlling episodes of hemorrhage and allow for bone remineralization. A multidisciplinary approach by otolaryngologists and neurointerventional radiologists can optimize the results.

Large arteriovenous malformation of the oromaxillofacial region with multiple phleboliths

Vascular tumors are the most common benign tumors of the head and neck in infancy and childhood. Vascular anomalies of the head and neck were divided into 2 categories including hemangiomas and vascular malformations. Oral and maxillofacial hemangiomas and vascular malformations are congenital lesions with various clinical characteristics, manifestations, indications, and possibilities for treatment. This paper reports a case of large arteriovenous malformations including a description of the features demonstrated by panoramic radiography, cone beam computed tomography, and magnetic resonance imaging. The differential diagnosis and treatment modalities (including embolization with N-butylcyanoacrylate in this case) are also discussed following the case presentation, along with the available literature review.

Intraoral curettage without presurgical endovascular embolization: a simple but controversial treatment of arteriovenous malformations of the mandible

Arteriovenous malformation of the mandible is a rare and life-threatening lesion. The gold standard treatment is to extirpate the lesion surgically after endovascular embolization. Preoperative endovascular embolization is widely accepted, but there are limitations to the treatment. The authors introduce a technique in which the lesion is divided into parts and filled with bone wax, then curetted step by step. This gradual curettage method is effective and could be used instead of the standard treatment especially in hospitals with limited facilities for endovascular embolization.