Are classification criteria for vasculitis useful in clinical practice? Observations and lessons from Colombia

Table 3 Histological specimens with vasculitis from the San Juan de Dios Hospital, Bogotá, Colombia, 1953 – 1997, according to a clinical-pathological correlation of vasculitis [92]

Vasculitis diagnosis	Number N = 304	Frequencies per 100,000 histological specimens	Percentages
			groups of vasculitis	subgroups of vasculitis
1. Leukocytoclastic vasculitis	107	64.6	35.2
1.1. Erythema elevatum diutinum	1	0.6		0.9
1.2. Secondary to diseases	42	25.4		39.3
1.2.1. SLE	14	8.5
1.2.2. PM/DM	14	8.5
1.2.3. Diffuse/limited scleroderma	5	6.7
1.2.4. Henoch-Schönlein purpura	9	5.4
1.3 Livedoid leukocytoclastic vasculitis	5	3		4.7
1.4. Idiopathic	59	35.6		55.1
2. Lymphomonocitic's vasculitis	53	32	17.4
2.1. Schamberg's purpura	1	0,6		1.9
2.2. Chronic urticaria, associated	1	0.6		1.9
2.3. Idiopathic	51	30.8		96.2
3. Nodular vasculitis	19	11.5	3.6
3.1. Erythema nodosum	7	4.2		36.8
3.2. Granulomatous panniculitis	2	1.2		10.5
3.3. Vasculitis in panniculitis	4	2.4		21.1
3.4. Idiopathic	6	3.6		31.6
4. Granulomatous vasculitis	11	6.6	3.6
4.1. Wegener's granulomatosis	3	1.8		27.3
4.2. Churg Strauss	2	1.2		18.2
4.3. Lymphomatoid granulomatosis (lung)	1	0.6		9.1
4.4. Granuloma annulare	1	0.6		9.1
4.5. Giant cell (Temporal) arteritis	1	0.6		9.1
4.6. Idiopathic	3	1.8		27.3
5. Polyarteritis nodosa	24	14.5	7.9
5.1. Generalized	16	4.8		66.7
5.2. Cutaneous	8	9.7		33.3
6. Vasculitis like diseases	4	2.4	1.3
6.1. Arterio-embolism	4	2.4		100
7. Infection-related vasculitis	20	12.1	6.6
7.1. Mycobacterium	12	7.2		60
7.2. Bacterial infections	8	4.8		40
8. Microscopic polyangiitis	1	0.6	0.3
9. Thromboangiitis obliterans	38	23	12.5
10. Unclassified vasculitis	27	16.3	8.9
TOTAL	304		100