Diffuse pulmonary lesions in early phase Takayasu arteritis predominantly involving pulmonary artery

We report a case of early phase Takayasu arteritis that predominantly involved the pulmonary arteries and had, along with expected radiographic findings, the unusual pattern of diffuse pulmonary parenchymal lesions on CT. We suggest that this finding may be an additional feature in early phase Takayasu arteritis and need not require investigation for an additional diagnosis.