Simultaneous presence of C-ANCA and P-ANCA in a patient with concurrent Churg-Strauss syndrome and giant cell temporal arteritis.

We herein describe the case of a 77-year-old woman, who presented clinical and histopathological evidence of giant cell arteritis (GCA) involving the temporal artery, together with a Churg-Strauss syndrome (CSS). Our patient presented positive anti-neutrophil cytoplasmic antibodies (ANCA), with cytoplasmic staining pattern (C-ANCA) that was specific against proteinase 3 (PR3), and also a perinuclear pattern (P-ANCA) with specificity against myeloperoxidase (MPO). To our knowledge, the simultaneous presence in the same patient of both types of antibodies has not been previously reported.