Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Congenital anosmia ?
    ### Response:
    How is congenital anosmia diagnosed? Isolated congenital anosmia (not associated with other symptoms) is a diagnosis of exclusion. This means that the diagnosis is made in people with suspicious signs and symptoms once other conditions that cause similar features have been ruled out.
    