Abnormal maxilla morphology Arteriovenous malformation of the maxilla 2017-08-12T15:53:52Z This abnormality may be accompanied by gingival swelling adjacent to the affected maxilla as well as by loosening of nearby teeth. Radiographic examination mayreveal a lytic lesion of the maxilla. An arteriovenous malformation is a disruption of the normal vascular pattern in which arteries or arterioles connect directly to the venous collection system, bypassing any capillary bed. This term refers to an arteriovenous malformation located in the maxilla.