The multiple cutaneous and mucosal venous malformations (VMCM) is characterized by the presence of small, multifocal bluish cutaneous and mucosal venous malformations. TEK (TIE2) is the only gene in which pathogenic variants are known to cause VMCM. TIE2 is vascular endothelial cell specific receptor tyrosine kinase, that plays a crucial role in angiogenesis and cardiovascular development.
