| Classification | Lymphocytes | Hyperplasia | Atrophy |
| 0 | <30/100 | - | Pre-infiltrative |
| 1 | >30/100 | - | Infiltrative |
| 2 | >30/100 | + | Infiltrative Hyperplasia |
| 3A | >30/100 | + | Partial flattening |
| 3b | >30/100 | + | Subtotal |
| 3c | >30/100 | + | Total |
| 4 | <30/100 | - | Total [hypoplasicatrophy] |