Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Mastocytic enterocolitis ?
    ### Response:
    How is mastocytic enterocolits diagnosed? Mastocytic enterocolitis is diagnosed after an endoscopic procedure in which the doctor takes samples of tissues (biopsies) from the lining of the intestines. The tissue is then sent to a pathologist who looks at it under the microscope.
    