Table 1. Evolution of histological patterns from 66 leprosy patients presented reactivation during or after treatment.
| 1st biopsy* | 2nd biopsy | 3 rd biopsy | 4th biopsy | ≠ patients (≠ with relapse**) |
| I | I | TT | - | 1 |
| TT | - | - | 5 | |
| TT | TRc | - | 2 | |
| BT | BT | - | 1 | |
| BT | BT | BT | 1 (1) | |
| BTRc | BT | - | 1 | |
| BB | - | - | 1 (1) | |
| Sub total | 12 | |||
| TT | TT | - | - | 5 |
| TRc | - | - | 1 | |
| TRc | TT | - | 1 | |
| Sub total | 7 | |||
| TRc | TT | - | - | 2 |
| Sub total | 2 | |||
| BT | BT | - | - | 2 (2) |
| BT | BT | - | 3 | |
| BTRc | - | - | 3 (1) | |
| BTRc | BT | - | 2 (2) | |
| BB | - | - | 2 (1) | |
| Sub total | 12 | |||
| BTRc | BT | - | - | 1 |
| BT | BTRc | - | 1 | |
| BT | BTRc | BT | 1 | |
| BTRc | BTRc | BTRc | 2 | |
| Sub total | 5 | |||
| BB | BT | - | - | 4 |
| BTRc | - | - | 2 | |
| BB | BT | - | 2 | |
| Sub total | 8 | |||
| BBRc | BTRc | BTRc | - | 1 |
| BB | BT | BT | 1 | |
| Sub total | 2 | |||
| BL | BT | - | - | 1 |
| BT | BTRc | - | 1 | |
| BTRc | - | - | 1 | |
| BTRc | BT | - | 1 | |
| BTRc | BTRc | - | 2 | |
| BB | - | - | 1 | |
| BBRc | BTRc | - | 1 | |
| BBRc | BB | BB | 1 | |
| BBRc | BBRc | - | 1 (1) | |
| Sub total | 10 | |||
| LLsp | BT | - | - | 2 |
| BB | - | - | 3 | |
| BB | BT | - | 1 | |
| BBRc | BTRc | - | 1 | |
| BBRc | - | - | 1 | |
| Sub total | 8 | |||
| TOTAL | 66 |
*Patients were grouped according to the pattern of the first biopsy.
**In parentheses are the 9 cases with relapse. (I) Indeterminate, (TT) tuberculoid-torpid, (TRc) tuberculoid-reactional, (BT) borderline-tuberculoid, (BTRc) borderline-tuberculoid-reactional, (BB) borderline-borderline, (BBRc) borderline-borderline-reactional, (BL) borderline-lepromatosus, (LLsp) lepromatous- subpolar, (-) biopsy not done.