referred to as Folle a` Deux, the cause is not well understood.
symptoms are delusions such as in delusional disorder which are similar in
content to those of an individual who already has an established delusion.
course of this disorder is widely variable. Often the best course of
action is separation from the other individual.
disorder can be chronic depending on the dynamics of the relationship, but
with separation, it can disappear, sometimes rather quickly.
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