CD34 and hereditary angioedema: There were few IC (0.00–0.3 mg/mL) measurements and MVD counts (0.00–3 vessels/HPF) in the solid and cyst components of HAE lesion, and no intact vascular structures were found in CD34-expressing regions In addition, the contrast medium uptake focused primarily on the perilesional area of HAE lesions, which is consistent with the location of contrast enhancement in imaging studies.