The diagnosis of Takayasu arteritis requires a high degree of clinical suspicion. We herein present two cases of Takayasu arteritis that demonstrate two important aspects of the disease, which leaded to a significant delay in the diagnosis. The first case presented with an indolent disease with a clinical course of 20 years until clinical diagnosis was finally established while the second case shows the commonly unrecognised aspect of severe renovascular hypertension in these patients.