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. 2023 Nov 16;11:1304133. doi: 10.3389/fped.2023.1304133

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© 2023 Kim, Hong, Park, Kim, Choi, Kim and Kang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Patient 1 had a large kaposiform hemangioendothelioma on her left upper arm (A), and the mass showed improvement after nine months of sirolimus administration (B). In this T2-weighted MRI, patient 3, who presented with a large cystic mass on the lower left neck and around the airway (indicated by the arrow) at birth (C), experienced relief from airway compression after 5 months of sirolimus treatment (D). Patient 4 showed a protruding mass suspected to be a lymphatic malformation on the right forehead and eyelid (E), and a T2-weighted MRI was obtained after 6 months of sirolimus treatment (F).