Table 2.
Controls
| Type of Control | Number of Studies |
|---|---|
| Intralesional normal saline | 21 |
| Cryotherapy | 13 |
| Photodynamic therapy/pulsed dye laser | 2 |
| Intralesional Water | 1 |
| Electrosurgery | 1 |
| Microneedling | 1 |
| Intralesional Collomak1 | 1 |
Abbreviations: MMR, measles, mumps, rubella vaccine; PPD, purified protein derivative; RCT, randomized controlled trial.
All controls used in RCTs are shown. Some studies compared treatment groups without a control (eg. MMR vs PPD) and thus are not listed here.
1
Collomak: Active ingredients include salicylic acid, acetic acid, decussate sodium, castor oil, pyroxylin, ethanol, acetone, and isobutyl acetate, depending on pharmacy formulation.