<prompt> Answer this question truthfullyWhat is the condition known as Rubber Bleb Nevus Syndrome, also referred to as Blue?  <response>: <reason> Blue rubber bleb nevus syndrome must be differentiated from dermatologic manifestations of kaposi Sarcoma, diffuse neonatal hemangiomatosis, familial glomangiomatosis, genetics of klippel-trenaunay-weber syndrome, maffucci syndrome and mucosal venous malformation syndrome. 