Vascular malformation - 血管畸形 https://en.wikipedia.org/wiki/Vascular_malformation
血管畸形 (Vascular malformation) 是血管或淋巴管的異常。隨著病變的生長,可能會導致美觀問題。病變可能在一生中持續變大。

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References Congenital arteriovenous malformation (ISSVA classification for vascular anomalies) - Case reports 38435403 
NIH
我們發現一名7歲男孩,右手自出生起即出現腫脹。其父親注意到情況惡化,且男孩感到腫脹部位周圍非常敏感。男孩於一個月前接受過一次手術,現在需要再次手術。我們正計畫為他進行硬化療法。
Presenting a Magnetic Resonance Imaging (MRI) finding of a 7 year, 5-month-old male who was brought to our rural hospital by his father with chief complaints of swelling over his right hand since birth. His father narrated that the swelling is increasing significantly and the child has tenderness over swelling. The child underwent an angioembolism 1 month ago and has been brought for re-embolism. Now sclerotherapy has been planned for the patient.