Pediatric Granulomatosis With Polyangiitis Mimicking IgA Vasculitis: A Case Report.

In the case of a patient with an unusual presentation of IgA vasculitis, to some degree of suspicion, the GPA should be considered. Also, in approach to non-thrombocytopenic palpable petechia and purpura a wide range of differential diagnosis such as infections, ANCA associated vasculitis, and secondary vasculitis should be considered. Therefore, 2 effective method of GPA diagnosis, the high titer of C-ANCA test and tissue biopsy, should be considered simultaneously.