Ishikawa clinical classification of Takayasu arteritis7
| Group | Clinical features |
|---|---|
| Group I | Uncomplicated disease, with or without pulmonary artery involvement |
| Group IIA | Mild/moderate single complication together with uncomplicated disease |
| Group IIB | Severe single complication together with uncomplicated disease |
| Group III | Two or more complications together with uncomplicated disease |