[Granulomatosis with polyangiitis (previously Wegener's granulomatosis) mimicking malingering].

INTRODUCTION: ANCA vasculitis may involve the skin and develop slowly without specific histology, and without autoantibodies.

CASE REPORT: We report a 50-year-old woman who experienced bilateral mastectomy because of ulcero-necrotic, non-specific inflammatory cutaneous lesions of the breasts. First considered by others as a malinger patient, she developed oto-neurological lesions leading to the diagnosis of Wegener's granulomatosis. Five years later, specific antibodies of the disease were present.

CONCLUSION: Cutaneous involvement by ANCA vasculitis can be isolated for a long time. Physicians must have a high degree of suspicion to avoid diagnostic delay of ANCA vasculitis.