A 32-year-old female is seen in the emergency department for acute shortness of breath. A helical CT shows no evidence of pulmonary embolus, but inciden-tal note is made of dilatation of the ascending aorta to 4.3 cm. All the following are associated with this finding。EXCEPT:(E)A. SyphilisB. Takayasus arteritisC. Giant cell arteritisD. Rheumatoid arthritisE. Systemic lupus erythematosus