Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) multiple cutaneous and mucosal venous malformations ?
    ### Response:
    Multiple cutaneous and mucosal venous malformations (also known as VMCM) are bluish patches (lesions) on the skin (cutaneous) and the mucous membranes, such as the lining of the mouth and nose. These lesions represent areas where the underlying veins and other blood vessels did not develop properly (venous malformations).
    