Intramuscular Arteriovenous Malformation in Right Masseter With Turkey Wattle Sign

Abstract

urpose. To discuss a rare tumor known as аrteriovenous malformations (AVMs), which is a condition where an artery and a vein are directly connected. The masseter muscle is the commonly affected site, with 5% of cases being reported. This condition can be confirmed through radiological diagnostic methods such as ultrasonography and cone-beam computed tomography.Materials and methods. A clinical case of a 46-year-old female patient who has had swelling in her right cheek region for two years, accompanied by intermittent pain while chewing and enlargement of a mass when lying down on her right side. Orthopantomography was advised to rule out odontogenic origin, followed which CBCT and ultrasonography was advised.Results. Cone-beam computed tomography revealed multiple calcified nodules involving the masseter region measuring roughly 2x2mm in size. US revealed an irregular soft mass in the inferior border of the right masseter muscle measuring roughly 17x9mm with clusters of venous channels noted within it, as well as areas of calcification.Discussion. Arteriovenous malformations (AVMs) are rare tumors that are uncommon in the head and neck region, and less than 1% of vascular tumors are found in muscles, with 15% in the head and neck muscles. Since intramuscular vascular malformations are found deep inside the muscle, it is challenging during physical examination to arrive at the diagnosis.Conclusion. Cone-beam computed tomography and ultrasonography can significantly improve the reliability and accuracy of observers in detecting arteriovenous malformations (AVMs). A multimodal approach to diagnosis is feasible for detecting AVMs.