4.5 Article

Efficacy and safety of oral sirolimus for high-flow vascular malformations in real clinical practice

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CLINICAL AND EXPERIMENTAL DERMATOLOGY
卷 47, 期 1, 页码 57-62

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WILEY
DOI: 10.1111/ced.14841

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Oral sirolimus shows good efficacy and safety in treating high-flow vascular malformations, with most patients experiencing partial relief and tolerating the treatment well. It can be a useful option for long-term stabilization of patients with high-flow vascular malformations.
Background Vascular malformations are a complex pathology with few treatment options. In previously published studies, oral sirolimus (rapamycin) has shown promising results in the treatment of low-flow vascular malformations, but its usefulness in high-flow vascular malformations is controversial. Aim To evaluate the efficacy and safety of sirolimus for the treatment of high-flow vascular malformations in real-life practice. Methods In a unit specializing in vascular anomalies, patients treated with oral sirolimus for high-flow vascular malformations were located by consulting the drug dispensations. Reviewing the electronic medical records, data on patient demographics, vascular malformation characteristics, treatments, toxicity and clinical course were collected and statistically analysed. Results Nine patients with vascular malformations were included: eight had arteriovenous malformation and one had arteriovenous fistula. Six of these malformations were isolated while three were part of a syndrome. Sirolimus was initiated at a dosage of 1-4 mg/day to be taken as a single dose. Partial response was observed in eight of the nine patients (88.9%) with high-flow vascular malformation, while worsening was observed in the remaining patient. The treatment was well tolerated and at the most recent follow-up, five patients remained on treatment with oral sirolimus. Conclusion Our results show that oral sirolimus is a well-tolerated therapeutic option, with an excellent safety profile, which can be useful in the long-term stabilization of patients with high-flow vascular malformations. Single-daily dosage may improve long-term adherence to treatment without worsening its effectiveness.

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