Vascular malformations impact the musculoskeletal system depending on the tissue involved (skin, subcutis, muscle, cartilage, or bone), the extent of involvement, and the type of anomalous vessels (arteries, capillaries, veins, or lymphatics). These malformations can cause a multitude of musculoskeletal problems for the patient and their Orthopedic Surgeon to manage. Leg-length discrepancy, intra-articular involvement, muscular lesions, and primary or secondary scoliosis are just to name a few. All of these problems can cause pain, deformity, and a range of functional limitations. Surgical and nonsurgical treatment plans both have a role in the care of these patients. Patients with vascular malformations may also suffer from life-threatening cardiovascular and hematologic abnormalities. For those patients who undergo surgery, thromboembolic risk is elevated, wound breakdown and infection are much more common, and bleeding risk continues well into the postoperative course. Because of the complex nature of these disorders, the clinician must have a full understanding of the types of lesions, their natural history, appropriate diagnostic studies, associated medical problems, indications for treatment, and all the treatment options. For severe malformations, especially syndromes such as CLOVES and Klippel-Trenaunay syndrome, interdisciplinary team management is essential for the best outcomes.
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