Table 1.
Classification of histological specimens with vasculitis from the San Juan de Dios Hospital, Bogotá, Colombia, 1953 – 1997, according to the Chapel Hill system [28]
| Vasculitis diagnosis |
Number N = 304 |
Frequencies per 100,000 histological specimens |
Percentages | |
| groups of vasculitis | subgroups of vasculitis | |||
| I. Primary vasculitis | 104 | 62.8 | 34.2 | |
| A. Large vessel vasculitis | 1 | 0.6 | 1 | |
| 1. Giant cell (Temporal) arteritis | 1 | 0.6 | ||
| B. Medium sized vessel vasculitis | 24 | 14.5 | 23.1 | |
| 1. Polyarteritis nodosa | 24 | 14.5 | ||
| C. Small vessel vasculitis | 79 | 47.7 | 75.9 | |
| 1. Wegener's granulomatosis | 3 | 1.8 | ||
| 2. Churg-Strauss syndrome | 2 | 1.2 | ||
| 3. Microscopic polyangiitis | 1 | 0.6 | ||
| 4. Henoch-Schönlein purpura | 9 | 5.4 | ||
| 5. Cutaneous leukocytoclastic vasculitis | 64 | 38.7 | ||
| II. Not classified vasculitis | 200 | 120.8 | 65.8 | |
| Total | 304 | 183.6 | 100 | |