颌骨动静脉畸形和静脉畸形的临床及CT影像学特征比较OA

Objective:To compare the clinical manifestations and CT imaging features of intraosseous arteriovenous malformations(AVMs)and intraosseous venous malformations(VMs)in the jaws.Methods:A retrospective analysis was conducted on 10 patients with intraosseous VMs of the jaws diagnosed in our hospital from May 2015 to November 2023,including 4 cases of jaw AVMs confirmed by digital subtraction angiography(DSA)or contrast-enhanced CT and 6 cases of jaw VMs confirmed by postoperative histopathology.Clinical data,including age,sex,lesion location,history of bleeding,and pain,were collected.CT imaging features,including lesion margin,internal structure,cortical bone integrity,tooth root resorption,and abnormalities of the mandibular canal,were analyzed.Fisher's exact test was used to compare imaging features between the two groups,and the diagnostic performance of different imaging features for identifying jaw AVMs was evaluated.Results:All 4 cases of jaw AVMs occurred in the mandible,and 2 patients had a history of bleeding.CT images showed ill-defined hypodense lesions with internal fibrous septa,and all mandibular canals on the affected side were enlarged.Among the 6 cases of jaw VMs,5 occurred in the mandible,and none had a history of bleeding.CT images mainly showed round or oval hypodense lesions with either well-defined or ill-defined margins,and displacement of the mandibular canal was observed in 2 cases.Significant differences were found between the two groups in abnormalities of the mandibular canal and cortical bone integrity(P<0.05).Abnormalities of the mandibular canal demonstrated relatively high sensitivity and specificity for the diagnosis of jaw AVMs.Conclusion:CT imaging features differ between jaw AVMs and VMs,warranting careful clinical differentiation.