Surgical management of arteriovenous malformation

[Management of pediatric vascular malformations]

BACKGROUND

Vascular malformations belong to the group of vascular anomalies. They are rare congenital diseases resulting from abnormal development of vessels and can arise in any location, often in the head and neck region. Clinical symptoms are variable, functional handicaps and esthetic problems may result.

MATERIALS AND METHODS

One differentiates between arteriovenous, lymphatic, venous, and capillary malformations and combinations thereof. Their classification, symptoms, diagnostics, and treatment options are discussed.

RESULTS

The different types of vascular malformations as well as their clinical presentation, diagnostic workup, and therapeutic options are presented, supported by clinical examples.

CONCLUSION

Interdisciplinary care of pediatric patients with vascular malformations is essential in order to generate a treatment concept after correct diagnosis and improve symptoms and quality of life.

Targeted treatments for vascular malformations: current state of the art

Vascular malformations, which arise from anomalies in angiogenesis, encompass capillary, lymphatic, venous, arteriovenous, and mixed malformations, each affecting specific vessel types. Historically, therapeutic options such as sclerotherapy and surgery have shown limited efficacy in complicated malformations. Most vascular malformations stem from hereditary or somatic mutations akin to oncogenic alterations, activating the PI3K-AKT-mTOR, RAS-MAPK-ERK, and G-protein coupled receptor pathways. Recognizing the parallels with oncogenic mutations, we emphasize the potential of targeted molecular inhibitors in the treatment of vascular malformations by repurposing anticancer drugs. This review delves into the recent development and future use of such agents for the management of slow- and fast-flow vascular malformations, including in more specific situations, such as prenatal treatment and the management of associated coagulopathies.

Staged endovascular and open surgical approach for treatment of a giant left upper back arteriovenous malformation

We present a case of a symptomatic, giant, left upper back arteriovenous malformation that was treated through a staged endovascular and open approach. Through a series of embolizations, followed by resection, we were able to preserve the limb and upper back neurovascular supply, demonstrating an approach to preserve sensation and function and improving quality of life.

SOLAMEN syndrome with cardiovascular damage

SOLAMEN syndrome is a rare, recently recognized congenital syndrome that is characterized by progressive and hypertrophic diseases involving multiple systems, including segmental overgrowth, lipomatosis, arteriovenous malformation (AVM) and epidermal nevus. According to literatures, SOLAMEN syndrome is caused by heterozygous PTEN mutation. Phenotypic overlap complicates the clinical identification of diseases associated with PTEN heterozygous mutations, making the diagnosis of SOLAMEN more challenging. In addition, SOLAMEN often presents with segmental tissue overgrowth and vascular malformations, increasing the possibility of misdiagnosis as klipple-trenaunay syndrome or Parks-Weber syndrome. Here, we present a case of a child presenting with macrocephaly, patchy lymphatic malformation on the right chest, marked subcutaneous varicosities and capillaries involving the whole body, overgrowth of the left lower limb, a liner epidermal nevus on the middle of the right lower limb, and a large AVM on the right cranial thoracic entrance. Based on the typical phenotypes, the child was diagnosed as SOLAMEN syndrome. detailed clinical, imaging and genetic diagnoses of SOLAMEN syndrome was rendered. Next-generation sequencing (NGS) data revealed that except for a germline PTEN mutation, a PDGFRB variant was also identified. A subsequent echocardiographic examination detected potential cardiac defects. We suggested that given the progressive nature of AVM and the potential severity of cardiac damage, regular echocardiographic evaluation, imaging follow-up and appropriate interventional therapy for AVM are recommended.

Our Experience in the Surgical Management of Arterio-Venous Malformations of the head and neck

Introduction

Vascular anomalies comprise a diverse group of abnormalities in blood vessel morphogenesis that usually occur prenatally. Arterio-venous malformations (AVMs) are rare congenital vascular lesions accounting for 1.5% of all vascular anomalies, with 50% of them occur in the oral and maxillo-facial regions. Treatment of large, complex vascular lesions is a serious challenge for patients and surgeons because it can cause disfigurement and massive haemorrhage, which may be spontaneous or the result of surgical intervention. Our study aimed to demonstrate surgical management of massive AVMs of the head and neck.

Method

This retrospective study shows the treatment outcomes of 28 patients with massive maxillo-facial vascular malformations, who presented to our department for treatment from 1 January 2015 to 31 July 2022.

Results

Twenty-eight patients with a mean age of 17.32 ± 12.21 years (women: 15, men: 13) were enrolled in the study. Diagnosis included extra cranial AVMs of the head and neck region. Treatment modalities, in isolation or combination, included angioembolisation procedure, sclerotherapy, and surgery.

Conclusion

Management of AVMs is challenging owing to the replacement of normal tissue by the diseased ones and the high rate of recurrence. Hence, multi-modal approaches are needed for the effective restoration of tissues.

Combined Preoperative Endovascular Embolization and Surgical Excision for Scalp Arteriovenous Malformations: A Systematic Review and Case Illustration

OBJECTIVE

To evaluate the efficacy of the combined approach of preoperative endovascular embolization (EE) and surgical excision (SE) for scalp arteriovenous malformation (AVM) and present an illustrative case report.

METHODS

A systematic review was conducted using online databases (PubMed/Medline, Cochrane, and Embase) on February 15, 2023. The inclusion criteria were any type of study of patients with scalp AVMs who were diagnosed and confirmed through angiography and treated with combined preoperative EE and SE. All the articles that met the inclusion criteria were included in this study.

RESULTS

A total of 49 articles (91 patients) were included. The patients' age ranged from 10 days to 70 years at the time of presentation. The most common symptoms were a pulsatile mass in 51 patients (56.04%), progressively growing mass in 31 patients (34.06%), and bruits and/or thrills in 22 patients (24.17%). Complications of preoperative EE and SE were observed in only 5 patients; 3 patients (3.29%) had harvested skin graft marginal necrosis, 1 patient (1.09%) had skin necrosis, and 1 patient (1.09%) had a wound infection. Only 2 patients (2.19%) reported a recurrent or residual mass during a median follow-up period of 12 months.

CONCLUSIONS

The management of scalp AVMs can be challenging; therefore, focused, and accurate identification of the complexity of the vascular anatomy is required. The combined method of preoperative EE and SE showed satisfactory outcomes with low rates of complications and recurrence; thus, we recommend this approach for the management of scalp AVMs.

Management of scalp arteriovenous malformations: a rising trend towards percutaneous direct puncture embolization technique-our experience

BACKGROUND

Scalp arteriovenous malformations (AVMs), or cirsoid aneurysms of the scalp, usually present with troublesome symptoms and cosmetic disfigurement. Endovascular/percutaneous embolization has evolved as a sole treatment method or adjunct to surgical excision in the management of scalp AVMs with an excellent outcome.

PURPOSE

To discuss minimally invasive techniques for treating scalp AVMs as well as to highlight the role of embolization before surgery.

MATERIAL AND METHODS

This is a retrospective study of 50 patients with scalp AVM who underwent embolization (percutaneous/endovascular) during 2010-2019 at a tertiary care center. n-butyl cyanoacrylate (n-BCA) was used as an embolizing agent in all the cases and the patients were followed up at three- and six-month intervals with Doppler evaluation.

RESULTS

A total of 50 patients were included in the study. The occipital region was the most common location; 82% were Schobinger class II lesions and 18% were class III lesions. Thirteen patients had small-sized AVMs and 37 patients had large-sized AVMs. Post-embolization surgery was performed in 36 patients. Of the patients, 28 underwent percutaneous embolization, 20 underwent endovascular embolization, and two underwent both to achieve complete embolization of the lesion. The number of percutaneous procedures increased in the latter half of the study period as the safety and efficacy of the technique were established. No major complications were seen in this study.

CONCLUSION

Embolization of scalp AVMs is a safe and effective technique and can be used in isolation for small lesions and as an adjunct procedure to surgery for large-sized lesions.

Extensive severe intraorbital arteriovenous malformations: report of a rare laser complication and successful management

Arteriovenous malformations (AVMs) are rare congenital errors of vascular morphogenesis, characterised by abnormal direct communications between arteries and veins, bypassing the normal capillary bed. Apart from the central nervous system, typical locations include the head and neck, and less frequently limbs, trunk or internal organs. AVMs of the head and neck often become clinically evident and symptomatic only in later childhood and are characterised by a history of variable growth, sometimes leading to large, deforming, pulsating masses with a propensity to massive haemorrhage. Therapeutic strategy is based on selective embolisation, surgical excision, or a combination of both. Radical surgical excision of local AVMs is the only effective treatment but it may be mutilating, especially for AVMs of the head and neck. Laser therapy represents a good option to treat the cutaneous aspects of AVMs nevertheless, its efficacy is limited. To the date, pharmacological therapy for AVMs is still on debate due to its controversial outcomes as it seems not as effective as other treatments and usually requires a longer course of application. However, pharmacological therapy could be useful in selected patients and for AVMs nonresponsive to traditional treatment, allowing them to obtain acceptable results without serious complications. This paper reports the case of a serious laser complication of extensive intraorbital AVM successfully treated by local reconstruction and topical pharmacological treatment.

Recurrent head and neck arteriovenous malformations: A case report

Head and neck arteriovenous malformations are rare, congenital, and high-flow vascular malformations characterized by abnormal communication between feeding arteries and draining veins without intervening capillaries. Arteriovenous malformations are considered the most dangerous type of vascular malformation because progressive symptoms and infiltration can result in potentially life-threatening consequences. Left untreated, arteriovenous malformations can cause significant cosmetic deformities, severe bleeding, and high-output cardiac failure associated with arteriovenous shunting. The effective treatment of arteriovenous malformations located in the head and neck region is quite challenging due to high rates of recurrence and potentially lethal complications. We describe a case presenting with large arteriovenous malformations in the face and neck. Despite attempting several treatments, including external carotid artery ligation and embolization with liquid embolic agents, the patient continued to experience recurrence and symptoms of bleeding and pain. After admission, reconstructive plastic surgery was performed, supplemented by percutaneous direct puncture embolization, using glue injected into the venous and transarterial embolization. The patient was discharged with clinical recovery. Digital subtraction angiography remains the gold standard for assessing symptomatic and aggressive arteriovenous malformations, both before and after treatment. The treatment of head and neck arteriovenous malformations often requires a multidisciplinary approach to achieve the best clinical results.

AV Malformation Within Buccinator Muscle-A Unique Finding

Arteriovenous malformations (AVMs) are most commonly reported in the brain whereas in head and neck region they are rare i.e. incidence is 0.1% of the general population. Commonly managed by surgical excision, embolization, sclerotherapy. Here we present a case of 18-year-old female with AV malformation within buccinator muscle which was recurrent and was treated with compartmentalization followed by sclerotherapy and surgical excision.

Case Report: A Rare Abdominopelvic Arteriovenous Malformation: Originating From Splenic Artery and Draining Into Portal Vein

Background

Abdominopelvic arteriovenous malformation is an uncommon congenital vascular lesion, for which the diagnosis and treatment are usually difficult. Though embolization and sclerotherapy are the primary treatment strategies, traditional surgical resection remains a valuable option.

Case Presentation

Herein, we present a 32-year-old female diagnosed with a massive abdominopelvic arteriovenous malformation that originates from the splenic artery and drains into the portal vein. The vascular lesion was evaluated with multiple imaging modalities and then surgically resected successfully. The patient was discharged post-operatively on day 6 and free of symptoms during the 12-month follow-up.

Conclusion

To our knowledge, the presented abdominopelvic arteriovenous malformation is the first to be reported in the literature, with such a rare condition originating from the splenic artery and draining into the portal vein.

Clinical Staging, Angioarchitecture Type, and Surgical Treatment of Arteriovenous Malformations in the Head and Neck: A Single-Center Retrospective Analysis

OBJECTIVE

Head and neck are the predilection sites of arteriovenous malformations (AVMs). Although embolization is the first-line treatment for AVMs, complete surgical removal of the lesion still has its value due to the best outcome with low recurrence rate. Here, the authors made a retrospective analysis on the surgical treatment of AVMs in the head and neck.

METHODS

From January 2006 to December 2019, a total of 18 patients with AVMs in the head and neck were enrolled in this study, including 10 males. The Schobinger clinical staging, Yakes' angioarchitecture type, and surgical treatment were analyzed. The follow-up data were collected. Then, individual treatment strategies were summarized.

RESULTS

According to Schobinger clinical classification system, 6 patients were at stage I, 7 patients at stage II, and 5 patients at stage III. According to Yakes' AVM classification system, 3 Type I, 4 Type II, 5 Type III, and 3 Type IV were confirmed. 3 patients cannot be confirmed due to lacking of arteriographic data. Surgical treatments included simple surgical excision (8 patients), dilator therapy (6 patients), and skin grafting after surgical excision (4 patients). In the follow-up period, 2 patients had recurrence and accepted operation again. All patients were satisfied with the appearance.

CONCLUSIONS

Individual surgical treatment based on the clinical stage and angioarchitecture type can achieve satisfactory results in AVMs in the head and neck.

Surgical Excision of Cirsoid Aneurysm of the Scalp: Case Series and Review of the Literature

BACKGROUND

Cirsoid aneurysms, also known as arteriovenous malformations (AVMs), of the scalp are relatively rare lesions. They may be found incidentally or with symptoms such as an enlarging pulsatile mass, headache, or bleeding.

METHODS

This retrospective case series comprised 10 cases of scalp AVMs that were treated with surgical excision from January 2010 to January 2020. Diagnosis was made with simple palpation and computed tomography angiography. Scalp AVMs were categorized according to the Schobinger classification.

RESULTS

There were 10 patients, 8 males and 2 females, with a mean age of 22.6 years (range, 10-40 years). All patients underwent ligation of the feeding artery with total excision of the AVM. There were no postoperative complications or recurrences during a mean follow-up of 21.6 months.

CONCLUSIONS

Preoperative embolization reduces vascularity and helps in easy identification as well as complete excision of cirsoid aneurysms during surgery. However, surgical excision alone of cirsoid aneurysms also results in excellent outcomes.

Expression of Cathepsins B, D, and G in Extracranial Arterio-Venous Malformation

Objectives: We have previously identified a population of cells that expressed stemness-associated markers in extracranial arterio-venous malformation (AVM) and demonstrated expression of cathepsins B, D, and G on embryonic stem cell (ESC)-like populations in other vascular anomalies. This study investigated the expression of cathepsins B, D, and G, and their localization in relation to this primitive population in extracranial AVM.

Methods: Immunohistochemical staining was performed on AVM tissue samples from 13 patients to demonstrate expression of cathepsins B, D, and G. Western blotting was performed on four AVM tissue samples and three AVM-derived primary cell lines to confirm protein expression of cathepsins B and D proteins. RT-qPCR was performed on three AVM-derived primary cell lines to demonstrate transcript expression of cathepsins B, D, and G. Enzymatic activity assays were performed on three AVM-derived primary cell lines to investigate if cathepsins B and D were active. Localization of the cathepsins was investigated using immunofluorescence dual-staining of the cathepsins with the ESC markers OCT4 and SOX2, and mast cells marker chymase on two of the 13 AVM tissue samples.

Results: Immunohistochemical staining demonstrated expression of cathepsins B, D, and G in all 13 AVM tissue samples. Western blotting showed expression of cathepsins B and D proteins in all four AVM tissue samples and all three AVM-derived primary cell lines. RT-qPCR demonstrated transcripts of cathepsins B, D, and G in all three AVM-derived primary cell lines. Enzymatic activity assays showed that cathepsins B and D were active. Immunofluorescence staining showed expression of cathepsins B and D on the OCT4+/SOX2+ endothelium and media of the lesional vessels and cells within the stroma in AVM nidus. Cathepsin G was expressed on the chymase+ phenotypic mast cells.

Conclusions: This study demonstrated the novel finding of the expression of cathepsins B, D, and G in AVM. Cathepsins B and D were expressed by the primitive population, and cathepsin G was localized to mast cells, within the AVM nidus.

Imaging of benign cervicofacial vascular anomalies and associated syndromes

Cervicofacial vascular anomalies can result in morbidity, pain, and cosmetic concerns in affected individuals. Each anomaly has its own unique natural history, treatment, and associations with underlying genetic syndromes. For optimal patient care, it is important for the neuroradiologist to accurately recognize and characterize these entities to ensure appropriate treatment and management. In this review, we discuss the general characteristics, classifications, and imaging features associated with the most common vascular anomalies such as hemangiomas, arteriovenous malformations and fistulas, capillary malformations, venous malformations, and lymphatic malformations in the context of associated syndromes. Additionally, we discuss novel imaging techniques that aid in identifying these vascular anomalies.

Interdisciplinary management of peripheral arteriovenous malformations: review of the literature and current proceedings

Arteriovenous malformations (AVMs) are a rare congenital vascular disorder. They represent a fast-flow vascular malformation. Clinically, AVMs present a heterogenous expression and can affect every part of the body. Here, we will solely focus on extracranial AVMs. Generally, AVMs progress with the patient's age. Patients often suffer from pulsation, skin discoloration, pain, ulceration, bleeding, and disfigurement. Diagnostic tools include color-coded duplex sonography, MRI and CT imaging, as well as the clinical examination. 4D dynamic perfusion-computed tomography may help in the interventional planning. Digital subtraction angiography is required during interventional therapy. AVMs pose a great challenge to the treating physician. The therapy of this rare disease should be managed in an interdisciplinary center for vascular malformations. It consists of conservative measures, such as compression garments and pain medication, transcatheter or, more rarely, percutanous embolization, and surgical resection. In smaller, localized lesions, resection with primary wound closure may be feasible, whereas extensive AVMs regularly require the reconstruction of the resulting soft tissue defect and possibly affected functional structures by means of free tissue transfer. In the interdisciplinary setting required for an appropriate treatment of AVMs, extensive knowledge of the various therapies, including those from different specialties, is necessary. Therefore, this article aims to provide an overview over both the interventional and surgical therapeutic options.

Surgical Treatment of Peripheral Vascular Malformations: A Systematic Review and Meta-Analysis

BACKGROUND

Surgical treatment of peripheral vascular malformations is widely performed as primary and secondary treatments. Excellent results have been reported; however, it is thought that complications are likely to occur because of damage to adjacent structures. This systematic review aimed to elucidate the indications and outcomes of surgical treatment of vascular malformations.

METHODS

PubMed, EMBASE, and the Cochrane Central Register of Controlled Trials were searched for studies reporting outcomes of surgery in at least 15 patients with a single type of peripheral soft-tissue vascular malformation. The authors extracted data on patient and lesion characteristics, treatment characteristics, and outcomes (including complications). Meta-analysis was conducted on recurrence and complication rates.

RESULTS

A total of 3042 articles were found, of which 24 were included: nine studies on arteriovenous malformations, seven on venous malformations, and eight on lymphatic malformations, totaling 980 patients. Meta-analyses showed pooled proportions for recurrences of 11 percent in arteriovenous malformations, 5 percent in venous malformations, and 9 percent in lymphatic malformations. Pooled proportions of major complications were 9 percent for arteriovenous malformations, 3 percent for venous malformations, and 1 percent for lymphatic malformations. The authors found a 5 percent pooled recurrence proportion in total resections, compared with 28 percent in subtotal resections. The pooled odds ratio for recurrence in total and subtotal resections showed a significant lower recurrence rate after total resection (odds ratio, 0.14, p = 0.02).

CONCLUSIONS

Surgical treatment of vascular malformations appears to be effective and safe in many cases. However, it seems that surgery is performed predominantly in small lesions, and subtotal resection has a higher risk of recurrence than total resection.

Cutaneomeningospinal Angiomatosis (Cobb Syndrome) in a Young Patient

Cobb Syndrome (Spinal Arteriovenous Metameric Syndrome 1-31 (SAMS 1-31)) is a rare, non-hereditary disorder. Approximately 100 cases of CS have been described to date. The actual incidence may be much higher since only symptomatic patients were documented. In particular, post mortem studies suggest a possibly higher incidence of this syndrome. The main clinical manifestations of this syndrome include skin stains of vascular nature on the torso, in combination with spinal vascular malformations localized in one and the same metameric or spinal segment. A rare diagnosis of this syndrome in patients over 18 is probably related to the fact that the disease may be asymptomatic throughout a long period of time [3], while patients may tend to disregard the skin lesions [5,6]. As a result, most publications on this pathology are based on separate case reports [7-9]. Significant variability of clinical manifestations as well as prolonged progress of the disease often cause errors in diagnosis. What follows is a case report of a young patient with Cobb Syndrome, who was admitted to a regional vascular centre with a misdiagnosis of stroke. 20 patients of young age (from 20 to 35 years old), with a diagnosis of stroke, who were admitted to a University Clinic (of the Russian National Research Medical University Named After Pirogov N.I., Moscow). Among this group of patients, a patient with Cobb syndrome was identified. Patient P., of 22 years, presented with acute, intensive cervical spinal pain, predominantly on the right, numbness and weakness in the arms and legs. About 3 weeks before admission to the hospital the patient had ARVI with a fever of up to 37.5°C: two weeks before the onset of symptoms he had undergone extirpation of 2 teeth, for which reason he spent over 2 hours in a forced position with his head thrown back (prolonged overextension in the cervical spine). Multiple skin angiomas on the chest spreading to the shoulder and scapula region. Tetraparesis up to 4 points: tetraparesis in hands with low muscle tone, low reflexes, tetraparesis in legs with high muscle tone, high reflexes. Foot clonus when causing Achilles reflexes. Tremor in the extremities. No plantar reflex pathology detected. Sensitivity disorders in the hands - "the high gloves". No pelvic disorders detected. Given the presence and exacerbation of neurological symptoms and cutaneous angiomas MRI with contrast agent of the cervical spine was recommended. MRimage of an advanced arteriovenous malformation (AVM) of the cervical spinal cord with signs of gliosis and spinal cord oedema at the С2 - С7 level. Endovascular embolization of the AVM in cervical spinal cord was performed. The treatment led to complete reversal of neurological symptoms. In the presence of skin lesions the diagnosis of CS does not present particular difficulties, so in children and young patients with skin angiomatosis it is advisable to conduct a comprehensive examination using selective spinal angiography or MR angiography to exclude arteriovenous malformations in spinal cord.

Japanese clinical practice guidelines for vascular anomalies 2017

The objective was to prepare guidelines to perform the current optimum treatment by organizing effective and efficient treatments of hemangiomas and vascular malformations, confirming the safety, and systematizing treatment, employing evidence-based medicine (EBM) techniques and aimed at improvement of the outcomes. Clinical questions (CQs) were decided based on the important clinical issues. For document retrieval, key words for literature searches were set for each CQ and literature published from 1980 to the end of September 2014 was searched in Pubmed, Cochrane Library, and Japana Centra Revuo Medicina (JCRM). The strengths of evidence and recommendations acquired by systematic reviews were determined following the Medical Information Network Distribution System (MINDS) technique. A total of 33 CQs were used to compile recommendations and the subjects included efficacy of resection, sclerotherapy/embolization, drug therapy, laser therapy, radiotherapy, and other conservative treatment, differences in appropriate treatment due to the location of lesions and among symptoms, appropriate timing of treatment and tests, and pathological diagnosis deciding the diagnosis. Thus, the Japanese Clinical Practice Guidelines for Vascular Anomalies 2017 have been prepared as the evidence-based guidelines for the management of vascular anomalies.

Vascular anomalies of the head and neck

The head and neck are the most common site of involvement for vascular tumors and malformations, with more than half of all vascular anomalies seen in this region. Lesions in this location can cause significant disfigurement and can be associated with airway obstruction, impairment in vision or hearing, swallowing disorders and hemorrhage. Accurate diagnosis is critical in determining treatment, and interdisciplinary care is essential for optimal management. We review clinical and imaging features that are key to establishing the correct diagnosis, and review treatment modalities, with emphasis on interventional and surgical procedures.

High Flow Scalp Arteriovenous Malformation: A Case Report

Scalp arteriovenous malformations (AVMs) are abnormal vascular lesions, which can be managed effectively and safely with surgical or endovascular approaches. Here, we discuss a case of scalp AVM malformation in a 25-year-old female, in which due to the proximity of the feeder artery to right orbit, surgical excision was preferred and the AVM was excised with an uneventful post-op course.

Vascular malformation and their unpredictable evolution: A true challenge for physicians

Vascular anomalies are mainly divided into two groups: vasoproliferative/vascular neoplasms (e.g., hemangioma), and vascular malformations (VMs). The main difference between the two resides in the histopathological assessment, while vascular tumors are true neoplasm, typically congenital with rapid postnatal growth, and eventual slow regression; VMs have a single endothelial cell lining, tend to be regarded as acquired despite being congenital in nature, can undergo sudden and massive growth, miming neoplastic proliferation. Arteriovenous malformation (AVMs) are one type of fast flow VMs, with a four-stage natural history, and potentially disruptive evolution. Magnetic resonance is the gold-standard for diagnosis and pre-operative planning while computer tomography is particularly valuable for AVMs involving bones, and selective angiography can define source / draining vessels for sclerotherapy and surgical planning. Given their unpredictable evolution, AVMs shouldn’t be treated until symptomatic, complicated, or aesthetically unacceptable. Surgical resection should be preceded by arterial embolization from 24 to 72 hours, which must be extensive in order to reduce the risk of recurrence. Pain due to ischemic condition is one of the most common and debilitating symptoms of AVM, while gassosus gangrene is the most feared complication as they can become pabulum for bacteria overgrowth eventually resulting in necrotizing fasciitis. Given their clinical evolution, VMs pose physicians at great challenge in identifying the best-suited treatment for each case. It is of paramount importance to be able to make accurate diagnosis, understand the basic physiology, and use appropriate diagnostic and treatment modalities to optimize outcome. Proper multidisciplinary approach along with constant psychological support is the basis for a successful final outcome. Aim of this work was to provide a deeper insight into these relatively uncommon pathology and related hardship that afflicts both patients and their families. (www.actabiomedica.it)

A Case of an Aggressive Intraosseous Arteriovenous Malformation in the Lower Extremity: Special Considerations for Diagnosis and Management

BACKGROUND

Arteriovenous malformations (AVMs) are rare, congenital vascular anomalies. Intraosseous AVMS most frequently arise in the head and neck, with only a small fraction occurring in the extremities. Herein, we report the findings of a combined soft tissue and intraosseous AVM involving the lower extremity of a 13-year-old child. This case highlights the necessity of an interdisciplinary approach for the effective treatment and management of these rare vascular anomalies.

CASE DESCRIPTION

A 13-year-old female presented with a 4-year history of intermittent pain and swelling over her right lateral malleolus. The patient was evaluated with radiologic imaging revealing an AVM involving the right distal leg, ankle, and hindfoot with intraosseous involvement of the distal tibia and talus. She was then referred to Vascular and Plastic Surgery and an angiogram was performed demonstrating shunting from the anterior tibial, peroneal, and posterior tibial arteries to the AVM. Venous drainage was to the anterior tibial and greater saphenous veins. Three embolizations were performed over the course of 6 months. Following the third embolization, the patient was taken to the operating room where Plastic and Orthopedic Surgery performed total resection of the nidus and involved bone which was then grafted with injectable synthetic bone graft.

RESULTS

Successful resection of the nidus was achieved, and the patient had an uncomplicated recovery. Within 6 months postoperatively, the patient demonstrated full range of lower extremity motion and was able to participate in age appropriate gross motor activities. Radiologic evaluation 7 months postoperatively showed no evidence of nidus recurrence.

CONCLUSION

Intraosseous involvement of AVMS is rare and presents a therapeutic challenge due to its invasive potential and high incidence of recurrence. Wide local excision with bone grafting and interdisciplinary management are paramount for complete resection.

Peripheral Arteriovenous Malformations-A Case Series

Context:

Arteriovenous malformations (AVMs) are aggressive vascular malformations that often result in significant morbidity. Patients may present to a dermatologist due to associated skin changes. Early diagnosis is important as treatment is available to halt their progression toward irreversible destruction of adjacent tissues.

Aims:

To study the clinical profile of peripheral AVMs presenting to the dermatologist and to provide a diagnostic algorithm.

Settings and Design:

A retrospective study of patients of all age groups with peripheral AVMs who presented to the Department of Dermatology at a tertiary care hospital in India was performed. Syndromic forms were also included.

Subjects and Methods:

We conducted a search of patients with peripheral AVMs, which were seen over a period of 51 months, i.e., from July 2014 to September 2018, from electronic medical records and reviewed their clinical details.

Statistical Analysis Used:

Descriptive statistics such as frequency, mean, and median were computed.

Results:

We report a series of 13 patients with peripheral AVMs, which constituted 6.7% (13/193) of all vascular malformations during this period. Of these, 8.3% (1/12) belonged to Schobinger's stage 1, 41.7% (5/12) to stage 2, 50% (6/12) to stage 3, and one with subcutaneous involvement devoid of cutaneous changes. The most common location was the extremities, which was seen in 53.8% (7/13). Syndromic association was present in 46.2% (6/13). Management included embolization, surgery, and medical treatment.

Conclusions:

The proportion of peripheral AVMs out of all vascular malformations was similar to reported studies. The extremities were more frequently involved as compared to the head and neck. The diagnostic algorithm provided will help us to optimize investigations and direct early management.

Resection and Reconstruction of Giant Abdominoscrotal Arteriovenous Malformation

Supplemental Digital Content is available in the text.

Genital arteriovenous malformations are rare and present unique surgical challenges in preserving urogenital function, abdominal wall integrity, and lower limb perfusion. A 32-year-old man with a giant abdominoscrotal arteriovenous malformation presented with recurrent heavy bleeding. Due to the high risk of rebleeding and fatal hemorrhage, surgery with curative intent was proposed and the patient was counseled on the risks of ischemia to the lower limb, testes, and penis. Preoperative embolization of the feeding vessels was performed. Three days later, surgical excision of the mass with the affected scrotum, left rectus muscle, sheath, and overlying abdominal skin followed. The testes were dissected from the malformation and preserved along with the right internal pudendal artery. The left thigh skin was advanced to the scrotal remnants and a neoscrotum created. The resulting large abdominal wall defect was reconstructed in layers with a pedicled anterolateral thigh flap, including innervated vastus lateralis muscle, to prevent herniation. Recovery was uneventful, and a 4-year follow-up revealed no significant clinical or radiological recurrence with recovery of flap sensation, retained erectile function, and no herniation. We report this case due to rarity of giant abdominoscrotal arteriovenous malformations and present preoperative embolization, surgical resection, and functional anterolateral thigh flap reconstruction as a valuable treatment option of this life-threatening illness.

Embolization and sclerotherapy of maxillofacial arteriovenous malformations with the use of fibrin glue combined with pingyangmycin

OBJECTIVE

The objectives of this study were to document the results of using fibrin glue (FG) combined with pingyangmycin (PYM) for the embolism and sclerotherapy of maxillofacial arteriovenous malformations (AVMs).

STUDY DESIGN

We reviewed the associated clinical data from December 2012 to June 2017 for 25 patients with maxillofacial AVMs. The major treatment method was direct percutaneous puncture and injection of FG combined with PYM. Treatment outcomes were assessed through physical examination, Doppler ultrasonography, computed tomography, and 3-dimensional computed tomography angiography scans. Follow-up time ranged from 12 months to 3 years after the last treatment (mean 21 months).

RESULTS

Of the 25 lesions, 80% showed greater than 90% reduction, 12% showed greater than 75% reduction, and 8% showed greater than 50% reduction. Superficial skin necrosis or mucous ulcer occurred in 3 patients and healed without intervention. Regrowth was observed in 3 patients with extensive lesions involving multiple anatomic regions.

CONCLUSIONS

These data suggest that embolization and sclerotherapy with the use of FG combined with PYM are safe and effective for the treatment of small- to medium-sized, locally dilated maxillofacial AVMs. For AVMs involving multiple anatomic regions, combined application of this approach with other options should be considered.

Method for Safely Excising a Large Head and Neck Arteriovenous Malformation in the Hybrid Operating Room

Large head and neck arteriovenous malformations are notoriously difficult to manage given their location and propensity for extreme hemorrhage. We propose a unique approach utilizing a Hyperform balloon and percutaneous Surgiflo sclerotherapy to provide intraoperative hemostatic stability during the excision of a left-sided scalp arteriovenous malformation. In a hybrid operating room a microcatheter balloon was fed into the left external carotid artery for occlusion of the malformation's main blood supply, and subsequently followed with digital subtraction angiography guided sclerotherapy of selective vessels. A split thickness graft was used to reconstruct the site of excision. This method offered optimal hemostatic control with a blood loss less than 120 cc. Our approach may offer safety advantages over traditional modalities and allow resection of head and neck lesions previously thought to be inoperable.

Japanese Clinical Practice Guidelines for Vascular Anomalies 2017

The objective was to prepare guidelines to perform the current optimum treatment by organizing effective and efficient treatments of hemangiomas and vascular malformations, confirming the safety and systematizing treatment, employing evidence‐based medicine techniques and aimed at improvement of the outcomes. Clinical questions (CQ) were decided based on the important clinical issues. For document retrieval, key words for published work searches were set for each CQ, and work published from 1980 to the end of September 2014 was searched in PubMed, Cochrane Library and Japana Centra Revuo Medicina databases. The strengths of evidence and recommendations acquired by systematic reviews were determined following the Medical Information Network Distribution System technique. A total of 33 CQ were used to compile recommendations and the subjects included efficacy of resection, sclerotherapy/embolization, drug therapy, laser therapy, radiotherapy and other conservative treatment, differences in appropriate treatment due to the location of lesions and among symptoms, appropriate timing of treatment and tests, and pathological diagnosis deciding the diagnosis. Thus, the Japanese Clinical Practice Guidelines for Vascular Anomalies 2017 have been prepared as the evidence‐based guidelines for the management of vascular anomalies.

Japanese clinical practice guidelines for vascular anomalies 2017

The objective was to prepare guidelines to perform the current optimum treatment by organizing effective and efficient treatments of hemangiomas and vascular malformations, confirming the safety, and systematizing treatment, employing evidence-based medicine (EBM) techniques and aimed at improvement of the outcomes. Clinical questions (CQs) were decided based on the important clinical issues. For document retrieval, key words for literature searches were set for each CQ and literature published from 1980 to the end of September 2014 was searched in Pubmed, Cochrane Library, and Japana Centra Revuo Medicina (JCRM). The strengths of evidence and recommendations acquired by systematic reviews were determined following the Medical Information Network Distribution System (MINDS) technique. A total of 33 CQs were used to compile recommendations and the subjects included efficacy of resection, sclerotherapy/embolization, drug therapy, laser therapy, radiotherapy, and other conservative treatment, differences in appropriate treatment due to the location of lesions and among symptoms, appropriate timing of treatment and tests, and pathological diagnosis deciding the diagnosis. Thus, the Japanese Clinical Practice Guidelines for Vascular Anomalies 2017 have been prepared as the evidence-based guidelines for the management of vascular anomalies.

Post-traumatic arteriovenous malformation of the superficial temporal artery

An arteriovenous malformation is a rare vascular anomaly composed of a complex network of interconnected arteries and veins of the scalp. It is usually congenital, but infrequently occurs after trauma. Over the years, several terms have been used to describe these lesions, such as cirsoid/rasemose/arteriovenous aneurysm, plexiform angioma and aneurysma serpentinum, or arteriovenous fistula when a single connection exists. Head and neck malformations occur in 0.1% of the population. Involvement of the superficial temporal artery is rare, occurring in about 0.5% to 2.0% of cases. They are diagnosed by angiography and can be managed by endovascular or open resection. The case of a 23-year-old man who presented with a pulsatile head mass after blunt trauma 5 years prior is presented. This entity was diagnosed as an arteriovenous malformation supplied by the superficial temporal arteries. He subsequently underwent successful open exploration and resection. The information is presented with the patient's consent.

Management of extracranial arteriovenous malformations of the head and neck

The purpose of this study was to review the outcomes of the different therapies for extracranial head and neck arteriovenous malformations (AVMs). AVMs are high-flow congenital vascular anomalies. They are composed of a complex system of vessels directly connecting feeding arteries to draining veins forming a nidus. They may be potentially life-threatening due to progressive symptoms and infiltrative disease. Extracranial AVMs most commonly affect the head and neck area (47.4%) followed by the extremities (28.5%). AVMs are best characterized as being either focal or diffuse. Focal AVMs have good outcomes following adequate treatment. Diffuse lesions have multiple feeding vessel, which results in high rates of recurrence despite treatment. The management of AVMs includes conventional surgery and endovascular techniques. A combination of embolization and surgical resection has become the treatment of choice over the last years. The main goal of both forms of treatment being the complete blockage or resection of the nidus. Transcatheter embolization of vessels has evolved over the years and new embolic agents have emerged. The types of materials available for embolization are classified into mechanical devices, liquid agents and particulates. Efficacy, rate of recurrence and most common complications were evaluated. AVMs recurrence after embolization or resection is reported in up to 80% of cases. Incomplete resection and embolization can induce aggressive growth of the remaining nidus and the risk of progression is up to 50% within the first 5 years and recurrences can occur up to 10 years later. Although ethanol seems to be associated with the highest degree of cure and permanent occlusion, the overall complication rate reported was 48%. Other materials, such as cyanoacrylate, have obtained modest rates of complete remission, while the reported rates of complete regression of AVMs with Fibrin glue and Polyvinyl alcohol are above 50%. At present, there are no unified agreement on the ideal embolic agent. Therefore, a multidisciplinary approach is recommended to support decision making about the best therapeutic approach and to achieve optimal outcome. A long-term post-treatment follow-up is recommended to recognize early recurrence.

Safety and outcome of combined endovascular and surgical management of low grade cerebral arteriovenous malformations in children compared to surgery alone

PURPOSE

To evaluate the outcomes of combined preoperative embolization and microsurgical resection in comparison with microsurgical resection alone as the current standard of care for low-grade cerebral arteriovenous malformations (AVM) in the pediatric population.

MATERIALS & METHODS

We performed a single-center retrospective study of pediatric patients presenting with Spetzler-Martin (SM) grade I and II cerebral AVMs at a high-volume tertiary pediatric hospital between January 2005 and September 2016. Low grade AVM patients were divided into two groups: pre-operative embolization with subsequent microsurgical resection or microsurgical resection alone. Patient demographics, clinical and imaging presentations, AVM morphological characteristics, post-operative complications, and mid to long-term clinical outcomes were studied. Post-embolization and post-surgical outcomes were assessed prior to and after treatment, at 3 months and at final follow-up using the modified Rankin Scale (mRS) to compare both final independent (mRS 0-2) and favorable (no change or improved mRS) clinical outcomes for comparison between study groups. Statistical associations of patient demographics, AVM characteristics/SM grading, and treatment modality group with post-operative complications were performed using univariate logistic regression analysis.

RESULTS

Thirty-four patients with low grade cerebral AVMs met the study inclusion criteria (mean age 10.6 ± 3.4 years; range 3-16 years, 22M:12 F). Twenty patients (59%) presented with ruptured AVMs. Twenty-five patients (73.5%) underwent combined treatment with embolization and microsurgical resection, while 9/34 (26.5%) underwent microsurgical resection alone. A total of 35 embolization procedures performed in 25 patients (Mode, 1; Range, 1-7) were associated with two minor post-embolization and 7 subsequent post-surgical (28%) complications, resulting in clinical deterioration in a single patient. Microsurgical resection alone was associated with 3 post-surgical complications (33%), resulting in permanent neurological disability in a single patient. There was no significance association of post-operative complications with either treatment modality group, combined treatment versus surgical resection alone [OR:1.13; 95% CI:0.23-5.62; p-value 0.88]. SM Grade II and eloquent locations were found to be significantly associated with post-surgical complications of low grade pediatric cerebral AVMs [OR 13.2 and OR 8 respectively, p-value 0.004 and 0.005). On mean follow-up time of 35.7 months, final clinical outcome was favorable in the majority of both treatment arms with no dependent (mRS>2) patients in the combined endovascular and surgical cohort. Two patients in the surgical cohort failed to achieve independent functional status, primarily due to a pre-operative morbid status (p-value 0.015). However, there was no significant difference in favorable outcomes between the treatment groups [p-value 0.14].

CONCLUSION

Our study suggests equivalent safety and favorable clinical outcomes related to combined endovascular embolization and microsurgical resection of low grade pediatric cerebral AVMs in comparison to microsurgical resection alone. On long term clinical follow-up, the vast majority of patients achieved an independent and favorable functional status irrespective of pre-operative embolization.

Vascular malformations of upper and lower extremity - from radiological interventional therapy to surgical soft tissue reconstruction - an interdisciplinary treatment

This article presents our experience in managing peripheral vascular malformations of upper and lower extremities over a 4-year period in a series of 46 patients of the Department of Plastic Surgery treated in the Interdisciplinary Center of Vascular Anomalies (ICVA) at the University of Regensburg. The patients presented vascular malformations of upper and lower extremity and were selected from our prospective vascular anomalies file archive from 2012 to 2016. During this period in the ICVA at University of Regensburg were performed more than 1400 radiological interventional treatments in patients with vascular malformations.The purpose of this retrospective study was to review combined embolotherapy, sclerotherapy (embolo/sclerotherapy), and surgical procedures (surgical excision and soft tissue reconstruction) to manage vascular malformations. Treatments were principally induced to reduce pain, daily physical limitations, social discomfort and recover tegument continuity after ulceration.The 46 patients were first examined with noninvasive radiological procedures. After diagnosis was posed, embolo/sclerotherapy, surgical procedures and clinically as well as radiological follow-ups were coordinated and established by the multidisciplinary team. All vascular malformations were categorized according to the classification approved at the April 2014 General Assembly of International Society for the Study of Vascular Anomalies (ISSVA) in Melbourne, Australia. Arteriovenous malformations (AVMs) were further classified following the Cho-Do and Schobinger classification.Embolo/sclerotherapy shows to be the most appropriate procedure in vascular malformations treatment. Nevertheless was found that in case of complications or lack of improvement as well as to improve functional or aesthetical results, a following partial or complete surgical excision and immediate soft tissue reconstruction seems to be the gold-standard treatment. In addition, the precise clinical and radiological diagnosis as well as an intensive postoperative patient care have a significant positive influence on the clinical outcome and patient satisfaction while decreasing morbidity and recurrence during early and late follow-up.Vascular malformations require a multidisciplinary approach and individual treatment after complex excision and indispensable reconstruction.

The rare case of a large complex intraosseous cranial arteriovenous malformation with successful multidisciplinary management

Intraosseous cranial arteriovenous malformations (AVMs) are very rare, challenging entities. The authors report the case of an extracranial parietooccipital vascular lesion. A 12-year-old boy presented with accelerated growth of a right scalp lesion over a few months. Digital subtraction angiography showed a large, right parietooccipital intraosseous AVM with multiple complex arterial feeders. Treatment of these lesions is difficult and can necessitate a multidisciplinary approach. In the featured case, 6 embolization procedures were performed over 1 year, including both transarterial and transvenous approaches, followed by total resection. The authors describe what is thought to be the second case of an AVM originating in the cranial bones and the first case with successful multidisciplinary management.

Case Report: ARTERIOVENOUS MALFORMATION IN FOOT. SURGICAL MANAGEMENT COMBINED WITH SCLEROTING AGENT

Diagnosis and management of arteriovenous malformation (AVM) requires a multidisciplinary approach and includes the knowledge of the pathophysiology of the blood vessels. The incidence of vascular anomalies is rare, and they are mainly localized in the head or upper extremity. There are studies on AVM with dermatological manifestations. However, studies involving manifestations in foot are rare. The goal of this report is to provide diagnosis and treatment case of an 19 year-old boy with arterio-venous malformation of the foot. A 19-year-old Indonesian male presented with a chief complaint of a painful mass on his plantar medial right foot that had been present since his birth and had increased in size. Physical examination revealed a large plantar medial mass, with size ± 8 x 5 cm, slightly mobile, bluish, soft, and non-compressible. The mass was pulsatile on palpation and no bruit. The working diagnosis of this patient was AVM. MRI showed there was a punctat or nidus, granular hyperintense in the middle and pedis with a draining vein, and the mass was laying from subcutaneous and extended into muscular layer. Surgical management was performed. Excision of AVM in subcutaneous part was combined with injection of polidocanol 1% in muscular side. Tissue pathology results revealed AVM with no evidence of malignancy. Evaluation wounds after 2 days of operation: there was no bleeding, no signs of infection, pain was reduced. Four weeks after surgery, the patient slowly could bear his full weight on his foot, and the mass and local pain were totally reduced. Length of stay in hospitals was 4 days. This report described an unusual localization of an arteriovenous malformation. Arteriovenous malformation in foot is a challenging malformation that can be successfully managed with excision and sclerosing agents.

Giant Chest Wall Arteriovenous Malformation: A Case Report and Literature Review

BACKGROUND

We present an interesting case of a 55-year-old male with a large left chest mass after significant cutaneous bleeding. Computed tomography angiogram of the chest revealed arteriovenous malformation with blood supply from sub-branches of the left subclavian artery, left internal mammary artery, and left external carotid artery. Measuring 5.0 × 14.0 × 10.8 cm, the mass extended superior to the clavicle and inferior to the third rib with medial and lateral borders at the level of the clavicular head and coracoid, respectively.

METHODS

Arteriovenous malformations (AVMs) are characterized by abnormal connections between arteries and veins which bypass the capillary system. Often small and asymptomatic, large AVMs can be painful, prone to bleeding and, if large enough, interfere with activities of daily living. While described involving various parts of the body, most notably in the central nervous system, there is a paucity of literature involving chest wall AVMs.

RESULTS

Using a staged, multidisciplinary approach, treatment began with an endovascular exclusion of the arterial blood supply, which involved a combination of coil embolization and stent exclusion of feeder vessels. Two days postembolization, the patient underwent an en bloc resection of affected portion of his chest wall. Reconstruction was completed with a combination rotational flap and split-thickness skin graft. Following the procedures, the patient had an uncomplicated recovery. Three years following procedure, he has no signs of recurrence of his AV malformation.

CONCLUSION

Surgical planning and indications for giant arteriovenous malformations remains a unique and difficult problem. The complex anatomy and extreme rarity of a chest wall AVM requires a multidisciplinary staged approach but can be treated with a multistage, multidisciplinary surgical approach with satisfactory and long-lasting results.

Outcome of Management of Vascular Malformations of Lip

OBJECTIVES

To describe the characteristics and outcome of management of vascular malformations of lip.

PLACE AND DURATION OF STUDY

The Department of Plastic Surgery and Burn Unit, King Edward Medical University, Mayo Hospital, Lahore, from January 2009 to December 2013.

METHODS

A prospective case series of 38 patients with vascular malformation of lip was performed. Demographic information and clinical features were noted. Treatment employed, complications, functional, and cosmetic outcome were recorded. Surgical debulking was performed as definitive treatment in all patients and nonsurgical techniques were added as adjuvant modalities in 18 patients. Sclerotherapy was performed for venous malformations in 10 patients. LASER was performed in 8 patients with capillary or combined malformations. Arterial malformations were managed surgically without embolization. Postexcision defects were closed primarily in 36 patients with Abbe flap in 1 and nasolabial flap in another patient for reconstruction.

RESULTS

Of 38 patients included in the study 20 (53%) were males with mean (SD) age 18 (6) years. Twenty-one percent were high and 79% low-flow malformations (29% venous, 16% capillary, and 34% combined). Lower lip was involved in 70% patients with 95% having difficulty in eating and 87% abnormal speech. Referring diagnosis was incorrect in 35% patients. Postsclerotherapy and postexcision pain scores were mean (SD) 5 (1.26) and 4 (1) respectively. All patients had improvement in eating and speech with restoration of normal muscle function in mean (SD) 5.63 (1.2) weeks. Ninety-five percent patients were satisfied with their outlook. One patient had recurrence at 1 year follow-up.

CONCLUSION

Surgical debulking with proper use of adjuvant procedure for vascular malformations of lip produces best functional and aesthetic results with minimal complications.

Outcomes of Surgical Treatment of Vascular Anomalies on the Vermilion

Background

The vermilion plays an important role in both the aesthetic and functional aspects of facial anatomy. Due to its structural features, the complete excision of vascular anomalies on the vermilion is challenging, making it difficult to determine the appropriate treatment strategy. Thus, the authors analyzed the results of surgical treatment of vascular anomalies on the vermilion.

Methods

The medical records of 38 patients with vascular anomalies on the vermilion who underwent surgery from 1995 to 2013 were analyzed. Nine of the cases had an involuted hemangioma, and 29 cases had a vascular malformation; of the vascular malformations, 13, 11, one, and four cases involved were capillary malformations (CMs), venous malformations (VMs), lymphatic malformations (LMs), and arteriovenous malformations (AVMs), respectively. We investigated the surgical methods used to treat these patients, the quantity of surgical procedures, complications and instances of recurrence, and self-assessed satisfaction scores.

Results

A total of 50 operations were carried out: 28 horizontal partial excisions, eight vertical partial excisions, and 14 operations using other surgical methods. All cases of AVM underwent complete excision. Six cases experienced minor complications and one case of recurrence was observed. The overall average satisfaction score was 4.1 out of 5, while the satisfaction scores associated with each lesion type were 4.2 for hemangiomas, 3.9 for CMs, 4.2 for VMs, 5.0 for LMs, and 4.0 for AVMs.

Conclusions

It is difficult to completely excise vascular anomalies that involve the vermilion. This study suggests that partial excision focused on correcting the overall contour of the lips is effective and leads to satisfactory results.

Large laryngeal vascular malformation in a 5-year-old child

A 5-year-old boy was admitted with stridor, which was initially interpreted as subglottic laryngitis. He had a history of prolonged hoarseness and his voice was deep for his age. The stridor persisted despite treatment with epinephrine inhalations and intravenous glucocorticoids. A direct laryngoscopy and blood work up did not support the suspected diagnosis. A MRI was then carried out, followed by angiography. The latter revealed an arteriovenous malformation (AVM) involving the lingual and superior thyroid arteries bilaterally. Owing to the rareness and extent of such an AVM, the patient was referred to Paris for further treatment. This case presents the difficulties in diagnostics and emphasises the importance of diagnostics and multidisciplinary approaches with regard to treatment of AVMs.