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Abstract
Introduction: Molluscum contagiosum (MC) is a common cutaneous viral infection. Potassium hydroxide (KOH), as a strong alkali, and cryotherapy have been used for its treatment. The objective of this study was to compare these two treatment modalities. Methods: 30 patients, aged between 1 and 24 years of age, were randomly divided into 2 groups: 15 were treated with KOH 10% solution and 15 were treated with cryotherapy. KOH 10 % was applied by the patient or their parent(s) two times a day until the lesions disappeared completely. Cryotherapy was performed with liquid nitrogen spray, repeated weekly for 4 weeks. The assessment of response and side effects were performed weekly for 4 weeks. Results: In the KOH group, 86.6% had complete response, 6.7% had partial response and 6.7% had no response after 4 weeks. In the cryotherapy group, 93.3% had complete response and 6.7% had partial response. There was no statistically significant difference between the two groups (p > 0.05). Postinflammatory hyperpigmentation, as a side effect, was mostly noted with cryotherapy. Conclusion: Both treatment modalities were equally effective. Since KOH is inexpensive and confers better cosmetic results compared to cryotherapy, it can be used as a suitable treatment modality for MC.