Introduction:
GCA usually affects people over 50 years of age. This systemic vasculitis affects large and middle size vessels and the humoral and cellular immune systems have been implicated in the pathogenesis [1]. The diagnosis is stablished by temporal artery biopsy that reveals an inflammatory infiltrate with multinucleated giant cells in 40 to 50% of the cases. The temporal ultrasonography with doppler of the temporal arteries showing a segmental edematous halo has a high sensitivity and specificity and the diagnosis can be made with this technique [1]. There is evidence that some auto-immune diseases have some relationship with certain types of cancer, mostly hematologic cancers [2]. Some types of vasculitis are more prone to be related with cancer, but this relationship is rare and paraneoplastic vasculitis represent only 5% [3]. This association has been described mostly with small vessel vasculitis or leukocytoclastic vasculitis [4]. Its appearance may precede or overlap the cancer diagnosis, or herald disease progression [3].