What you are describing sounds like Carpal Tunnel Syndrome. I don't know if there is a connection between Carpal Tunnel and Lymphangioma, or if this is what you are experiencing. I have had Carpal Tunnel on and off since my first pregnancy (for about 7 years), so that's my experience with it. Your hands and arms get numb at night and you experience lots of tingling in the hands doing fine motor activities.
Hope you find some help!