A Case of Granulomatosis with Polyangiitis with Various Breast Lesions as the Initial Symptoms: A Case-Based Review

Table 1

Clinical characteristics of 35 cases of breast lesions with GPA.

Mean age ± SD years	49 ± 14 (28–81)
Gender	Male: 2, female: 33
ANCA	PR3(C)-ANCA: 10
	Negative: 4
	Not described: 21
Location of breast lesion	Bilateral: 7
	Unilateral: 28 (right: 18, left: 9, unknown: 1)
Formation of breast lesion	Nodule/tumor: 31
	Ulceration: 6
	Discharge from nipples: 1
Onset of breast lesion	Initial symptom: 19
	Onset after GPA diagnosis: 15
Pathology of breast lesion	Necrotizing granulomatous vasculitis: 25
	Granulomatous mastitis: 4
	Others (inflammation with giant cells, panniculitis): 5
Treatment	Corticosteroid: 28
	Cyclophosphamide: 16
	Rituximab: 4