Table 4.

Anamnesis and kidney biopsy results of patients with kidney histological findings compatible with “de novo” immuno-rheumatological diseases (IRDs) (absent in personal medical history)—Group 3 (n = 65).

Kidney Biopsy Diagnosis	n (%)
Primary GN	0
Secondary GN	63 (98)
LN	24 (36.9) *
CV	4 (6.1)
** Renal microscopic vasculitis	33 (50.8)
PAN	1 (1.5)
APSN	2 (3.1) *
TIN	1 (1.5)
VN	0

* One patient had both LN and APSN. APSN: antiphospholipid syndrome nephropathy; CV: cryoglobulinemia vasculitis; GN: glomerulonephritis; LN: lupus nephritis; CV **. Renal microscopic vasculitis: twenty-six patients with microscopic polyangiitis (MPA); four patients with granulomatosis with polyangiitis; and three patients with eosinophilic granulomatosis with polyangiitis (Churg–Strauss). PAN: polyarteritis nodosa; TIN: tubulointerstitial nephritis; VN: vascular nephropathy.