Inguinal hernia – Aachen classification.
| Localization of the hernial orifice | Size of the hernial orifice |
| L = lateral; indirect inguinal hernia. | I < 1.5 cm |
| M = medial; direct inguinal hernia | II 1.5-3 cm |
| F = femoral; thigh hernia | III > 3 cm |
| C/ML = combined hernia | |
| Rx = recurrence count (number of recurrences). |
