Abstract
Topical timolol is not effective in the treatment of some superficial infantile hemangiomas (IHs). This is a prospective study aiming to investigate the predictors of treatment response of superficial IHs to topical timolol. Patients with superficial IHs were prescribed timolol 0.5% cream four times daily and followed up every 2-3months until 1 year of age. IH thickness was objectively measured by ultrasound, and the proportional change was calculated as a regression rate. In total, 193 patients (211 lesions) were enrolled. Topical timolol was initiated at an average age of 3.1 (0-6) months for 7.4 (2-11) months. The average regression rate of all lesions was 41.8% (-137.5%-100%). Lesion thickness (p=0.000) and patient age at initial treatment (p=0.001) were major variables that predicted the treatment response. On average, an increase in lesion thickness of 1 mm decreased the regression rate by 22.1%, and lesions thicker than 1.9 mm were unlikely to respond (average regression rate=-0.27%). Available results did not show a significant effect of sex (p=0.659), lesion size (p=0.311), or location (p > 0.05) on regression. Treatment for superficial IHs should be individualized according to lesion thickness and patient age.
Published Version
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