Table 1.
CEAP classification of chronic venous disorders
| Clinical classification (C)a | |
| C0 | No visible sign of venous disease |
| C1 | Telangiectases or reticular veins |
| C2 | Varicose veins |
| C3 | Edema |
| C4 | Changes in skin and subcutaneous tissueb |
| (A) Pigmentation or eczema | |
| (B) Lipodermatosclerosis or atrophie blanche | |
| C5 | Healed ulcer |
| C6 | Active ulcer |
| Etiologic classification (E) | |
| Ec | Congenital (e.g., Klippel-Trenaunay syndrome) |
| Ep | Primary |
| Es | Secondary (e.g., postthrombotic syndrome, trauma) |
| En | No venous cause identified |
| Anatomic classification (A) | |
| As | Superficial |
| Ad | Deep |
| Ap | Perforator |
| An | No venous location identified |
| Pathophysiologic classification (P) | |
| Pr | Reflux |
| Po | Obstruction, thrombosis |
| Pr,o | Reflux and obstruction |
| Pn | No venous pathophysiology identified |
CEAP, clinical, etiologic, anatomic, pathophysiological.
a
The descriptor A (asymptomatic) or S (symptomatic) is placed after the C clinical class.
b
C4 is subdivided into A and B, with B indicating higher severity of disease and having a higher risk for ulcer development.