Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Non-involuting congenital hemangioma ?
    ### Response:
    How is non-involuting congenital hemangioma diagnosed? Non-involuting congenital hemangioma (NICH) is diagnosed by taking a biopsy of the skin mark and examining the tissue under a microscope.  NICH looks different under the microscope than most infantile hemangiomas because the blood vessels are arranged more irregularly.
    