Vascular Anomalies

Arteriovenous Malformation of the Superficial Femoral Artery: A Case Report

Peripheral arteriovenous malformations (AVMs) are rare vascular anomalies characterized by abnormal connections between arteries and veins that bypass the capillary system. This case report details a three-year-old female child who presented with an enlarging swelling on her knee's medial side. AVM was diagnosed using computed tomography (CT) angiography and surgically excised. The case highlights the importance of early detection and timely intervention of AVMs to prevent complications.

Arteriovenous malformation of the ear optimized with cinematic rendering images: A case presentation and review of literature

Arteriovenous malformations (AVMs) define rare aberrations in vascular morphogenesis. AVMs are typically present at birth, and unless they are stimulated to grow quickly by trauma, illness, or hormonal effects, they enlarge in proportion to an individual's growth. Clinical manifestations of AVMs are often linked to abnormal mass effects and blood perfusion. In this report, we describe a unique case of AVM of the left ear in a 24-year-old male, employing cinematic rendering along with a review of differential diagnosis and treatment options.

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)

An enormous arteriovenous malformation presenting in a child in sacro-gluteal region and managed successfully by recurrent embolisation and surgery

BACKGROUND

Arteriovenous malformations (AVMs) are rare congenital lesions that affect multiple regions. AVMs often affect the brain and the buttock is the least common. They are usually congenital, but discovered later in life as they are asymptomatic, small and resemble a benign lesion. However, they can abruptly grow and become symptomatic and life-threatening as they can bleed and get infected.

PRESENTATION OF CASE

An eight-year-old girl presented with ulcerated and bleeding AVM at the sacro gluteal region. However, due to financial difficulty, it grew to reach an enormous size of (15*15*2 cm) in the buttock. It was later managed by multiple embolisation followed by total surgical resection.

DISCUSSION

This case reflects the first case of enormous AVM in the sacro-gluteal region in a child in the Middle East as they rarely reach such huge sizes. Total resection was possible by repeat embolisation and surgery.

CONCLUSION

Embolisation can render even huge AVM operable. AVMs should be treated as early as possible as they continue to grow and drastically decrease the quality of life of the patient.

The changing face of complicated infantile hemangioma treatment

Infantile hemangiomas are the most common vascular tumors of infancy. A multidisciplinary approach including dermatologists, otolaryngologists, plastic surgeons, hematologists/oncologists and interventional/diagnostic radiologists is crucial for appropriate management of children with complicated infantile hemangiomas. Since its unforeseen discovery in 2008, propranolol has become the first-line treatment for infantile hemangiomas, eclipsing systemic corticosteroids and radiologic intervention. There are still, however, uncommon indications for more aggressive interventional management. We review the 2014-updated International Society for the Study of Vascular Anomalies (ISSVA) classification for vascular anomalies. Additionally, we suggest management algorithms for complicated lesions, including recommendations for radiologic and surgical intervention.

Spontaneous Cystic Penile Vascular Malformation in an Adolescent and Review of the Literature

Vascular malformations rarely involve the male genitalia, and even fewer appear as cystic lesions on the penile shaft. We report an uncommon case of spontaneous swelling near the coronal margin of the penis that was found to arise from a vascular malformation. We review the pathologic findings and the literature regarding vascular malformations of the penis and other penile cystic structures that have similar clinical appearance, and discuss treatment options for penile vascular malformations.

Vascular Anomalies in Pediatrics

A standardized classification system allows improvements in diagnostic accuracy. Multidisciplinary vascular anomaly centers combine medical, surgical, radiologic, and pathologic expertise. This collaborative approach tailors treatment and management of vascular anomalies for affected individuals.

Overgrowth syndromes with complex vascular anomalies

Management of overgrowth syndromes with complex vascular anomalies is challenging. Careful analysis of the various clinical features by an interdisciplinary team of physicians experienced in this field is paramount to proper diagnostic and therapeutic approaches. In this article, we focus on the spectrum of the clinical presentation and the management strategies of the most common overgrowth syndromes with complex vascular anomalies.

Vascular malformations: a review

Identification and treatment of vascular malformations is a challenging endeavor for physicians, especially given the great concern and anxiety created for patients and their families. The goal of this article is to provide a review of vascular malformations, organized by subtype, including capillary, venous, lymphatic and arteriovenous malformations. Only by developing a clear understanding of the clinical aspects, diagnostic tools, imaging modalities, and options for intervention will appropriate care be provided and results maximized.

Congenital malformations of pediatric surgical interest: prevalence, risk factors, and prenatal diagnosis between 2005 and 2012 in the capital city of a developing country. Bogotá, Colombia

BACKGROUND

Congenital anomalies (CAs) cause nearly one third of infant deaths worldwide. Various surveillance systems have been established, such as the Bogota Congenital Malformations Surveillance Program (BCMSP). Some CAs are of special interest to pediatric surgeons: omphalocele, gastroschisis, intestinal and esophageal atresia, anorectal malformations, vascular anomalies, diaphragmatic hernias, hypospadias and cryptorchidism. The aim of this study is to determine the prevalence of such CAs, and identify possible risk factors.

METHODS

Data from the BCMSP were collected between January 2005 and April 2012. CAs were classified in accordance with the ICD-10 and grouped for analysis purposes. Data on CA frequencies were obtained from the BCMSP. Association analyses were performed using the case-control methodology.

RESULTS

282,523 births were registered. 4682 (1.66%) had one or more CAs at birth. The prevalence of CAs requiring pediatric surgery was 1 in 1000. The most frequent CAs were vascular anomalies, hypospadias, and anorectal malformations. Exposure to external factors was significantly associated with selected CAs. 51% of selected birth defects were not diagnosed in prenatal ultrasound.

CONCLUSIONS

This study highlights the importance of evaluating the local prevalence of congenital malformations. We propose the creation of specialized centers in Bogota to manage patients with CAs.

Beta-blockers for the treatment of problematic hemangiomas

OBJECTIVE

To examine treatment indications, efficacy and side effects of oral beta-blockers for the treatment of problematic hemangiomas.

METHODS

A retrospective review of patients with hemangiomas presenting to the Alberta Children's Hospital Vascular Birthmark Clinic (Calgary, Alberta) between 2009 and 2011 was conducted. The subset of patients treated with oral beta-blockers was further characterized, investigating indication for treatment, response to treatment, time to resolution of indication, duration of treatment, occurrence of rebound growth and side effects of therapy.

RESULTS

Between 2009 and 2011, 311 new patients with hemangiomas were seen, of whom 105 were treated with oral beta-blockers. Forty-five patients completed beta-blocker treatment while the remainder continue to receive therapy. Indications for treatment were either functional concerns (68.6%) or disfigurement (31.4%). Functional concerns included ulceration (29.5%), periocular location with potential for visual interference (28.6%), airway interference (4.8%), PHACES syndrome (3.8%), auditory interference (0.95%) and visceral location with congestive heart failure (0.95%). The median age at beta-blocker initiation was 3.3 months; median duration of therapy was 10.6 months; and median maximal treatment dose was 1.5 mg/kg/day for propranolol and 1.6 mg/kg/day for atenolol. Ninety-nine patients (94.3%) responded to therapy with size reduction, colour changes, softened texture and/or healing of ulceration. Rebound growth requiring an additional course of therapy was observed in 23 patients. Side effects from beta-blockers included cool extremities (26.7%), irritability (17.1%), lower gastrointestinal upset (14.3%), emesis (11.4%), hypotension (10.5%), poor feeding (7.6%), lethargy (4.8%), bronchospasm (0.95%) and rash (0.95%). Side effects did not result in complete discontinuation of beta-blocker treatment in any case; however, they prompted a switch to a different beta-blocker preparation in some cases. Resolution of the primary indication, requiring a median time of three months, occurred in 87 individuals (82.9%).

CONCLUSIONS

Treatment of infantile hemangiomas with oral beta-blocker therapy is highly effective and well tolerated, with more than 94% of patients demonstrating a response to treatment and 90% showing resolution of the primary functional indication for treatment.

Management of haemangioma with sclerosing agent: a case report

The use of multiple weekly intralesional injections of 3% sodium tetradecyl sulfate as a sclerosing agent for the management of facial haemangiomas is a safe treatment with acceptable results. As presented in this case report, this technique offers the patient considerable relief of symptoms with minimal complications. However, the possibility of second-stage surgery to correct residual deformity is still considered. Sclerotherapy with 3% sodium tetradecyl sulfate provides a good preparation for further surgery.

The epidemiological profile of the Vascular Birthmark Clinic at the Alberta Children's Hospital

BACKGROUND

The Vascular Birthmark (VBM) Clinic at the Alberta Children's Hospital (Calgary, Alberta) is a multidisciplinary clinic dedicated to the evaluation of children with vascular anomalies.

OBJECTIVE

To review the characteristics of patients seen at the VBM Clinic.

METHOD

A retrospective data analysis of all pediatric patients presenting to the VBM Clinic between 1998 and 2009 was performed. Data including demographic, referring, diagnostic and treatment information were obtained from the clinic's database.

RESULTS

Of 932 patients, 621 with hemangiomas and 311 patients with vascular malformations were found in the database. Hemangiomas were more commonly found in girls (68.5%), and most commonly located on the head and neck (54%), with most patients (72.6%) having only one lesion. Of the patients with hemangiomas, 14.7% underwent diagnostic imaging investigation and 23.7% received treatment including medications, surgery, pulsed-dye laser or dressings. The sex distribution among the 311 patients with vascular malformations was almost equal. Venous malformations accounted for 38.9% of patients, isolated capillary malformations for 31.5%, lymphatic malformations for 11.6%, mixed low-flow malformations for 14.8% and arteriovenous malformations for 2.9%. Overall, 37.9% of patients underwent diagnostic imaging investigation and 42.4% received treatment - either pulsed-dye laser, surgical excision, sclerotherapy or other treatment.

CONCLUSIONS

Hemangiomas and vascular malformations can occur at any anatomical site. There is a large variation in clinical presentation necessitating expertise in a variety of diagnostic approaches and treatment modalities. Vascular anomalies are best managed in a multidisciplinary setting.

MR imaging characteristics of soft tissue vascular anomalies in children

Accurate classification of soft tissue vascular anomalies is critical since treatment options and morbidity differ significantly for the various groups of vascular anomalies (VA). A classification system introduced by Mulliken and Glowacki in 1982 explained the biology of VA, thus resulting in improved management and communication between different disciplines taking care of children with soft tissue vascular anomalies. This classification has been updated by the International Society for the Study of Vascular Anomalies in 1996 and forms the basis for the current nomenclature. Although the majority of vascular anomalies can be accurately classified by their clinical history and a physical exam, imaging is necessary to determine the full anatomical extent of the anomaly, to follow up treatment response, to confirm diagnosis, and to provide correct classification in challenging cases when necessary. This article will review the key magnetic resonance imaging (MRI) features of most common soft tissue vascular anomalies in children. MRI and dynamic contrast-enhanced magnetic resonance angiography are crucial for the evaluation of vascular anomalies in children because of lack of radiation, high soft tissue resolution, and the capability of dynamic contrast-enhanced images to reflect the hemodynamics of the anomalies.

Exsanguination by intent: controlled phlebotomy during resection of a giant vascular malformation in a 22-month-old child

Resection of large vascular malformations may require transection across the lesion, resulting in uncontrollable bleeding with the risk of exsanguination or massive transfusion-related complications such as hyperkalemic cardiac arrest. We present the anesthetic management of a 22-month-old child with a giant vascular malformation who required surgical intervention because of increasing pain and bleeding from the lesion. As a standard resection carried a high risk of mortality for the patient, a novel surgical approach was performed, consisting of gradual compression of the lesion, reducing its base to allow transection across the smallest possible area. This compression resulted in acute massive autotransfusion managed by therapeutic phlebotomy of more than twice the circulating blood volume of the patient, guided by CVP and blood pressure. Although subsequent resection was still associated with large blood loss, the hemodynamic course of the patient was stable, and both bleeding and massive transfusion occurred in a controlled fashion allowing safe and successful resection of the malformation.

Vascular anomalies of the male genitalia

PURPOSE

Vascular tumors and malformations of the male genitalia can affect urinary, sexual, reproductive, and emotional function.

METHODS

Male patients with a genital lesion evaluated or treated at our center from 1995 to 2010 were reviewed to analyze presentation, diagnosis, treatment modalities, and outcome.

RESULTS

Of the 3889 male patients, 117 had a vascular anomaly of the genitalia: 12 tumors and 105 malformations. The referring diagnosis was accurate in 72.7% of patients with a tumor, whereas 46.3% of malformations were misdiagnosed. Tumors included infantile hemangioma (n = 10) and kaposiform lymphatic anomaly (n = 2). Common vascular malformations were lymphatic (n = 46), venous (n = 33), and capillary-lymphatic-venous (n = 16). Presenting signs for tumors included ulceration (33.0%) and ambiguous genitalia (25.0%). Malformations manifested with swelling (40.0%), fluid leakage (16.2%), and pain (16.2%). Treatment was necessary for 69.9% (79/113) of patients. The remaining lesions (34/113) were observed. Tumor management included observation, pharmacotherapy, and excision. Malformations were largely treated with sclerotherapy and/or surgical procedures.

CONCLUSIONS

Vascular anomalies of the male genitalia are uncommon and frequently misdiagnosed. Accurate diagnosis can be made and appropriate treatment can be instituted based on presentation, natural history, and radiographic imaging. Observation and pharmacotherapy are the mainstays of tumor management. Malformations require sclerotherapy and/or resection. Interdisciplinary care optimizes outcomes for males with these often-disfiguring vascular lesions.

Emergency endoscopy in children

Endoscopy in children has developed along with pediatric gastroenterology over the last four decades. Introduction of endoscopic techniques in adults precedes application in children, and pediatric endoscopists do fewer procedures than their adult counterparts whether routine or as an emergency. Training for pediatric endoscopists therefore needs to be thorough. This article in particular highlights developments in pediatric gastroenterology of importance to emergency procedures.

New treatment options for lymphangioma in infants and children

Lymphangiomas are congenital malformations of the lymphatic system. These lesions occur most often in the head and neck area, and their treatment continues to be a challenge. Fortunately, a number of advances have occurred in the diagnosis and management of lymphatic malformations in the past decade. The purpose of this article is to clarify the embryology, pathogenesis, histopathology, and classification of these lesions, as well as to describe their various forms of clinical presentation. We provide a complete review of the diagnostic measures available and thoroughly discuss new therapeutic interventions proposed to treat lymphangiomas.