Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Multiple familial trichoepithelioma ?
    ### Response:
    How is multiple familial trichoepithelioma diagnosed? Diagnosis of multiple familial trichoepithelioma is made based upon the clinical symptoms in the patient, the patients family history, and the appearance of the trichoepithelioma cells under a microscope (histology).
    