Mateo has recently been diagnosed with a mental health disorder using a classification system. He has presented with a number of symptoms including persistent feelings of worthlessness, severe fatigue combined with difficulty staying asleep, and occasionally hearing whispering voices when alone. He also experiences sudden episodes of intense panic.
Mateo's psychiatrist has diagnosed him with major depressive disorder with psychotic symptoms. Mateo's sister disagrees with this diagnosis, believing his symptoms are better explained by a culture-bound syndrome recognized in their heritage. She wants him to seek a second opinion from a practitioner who shares their cultural background.
To what extent are classification systems a reliable and valid way of diagnosing mental health disorders?
You must make reference to the context in your answer.
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