Objective
We present four clinical cases of young patients with “unusual” obsessive-compulsive disorder (OCD), considering the unequivocal evidence suggesting the existence of possible overlaps between psychotic disorders and OCD symptoms.
Methods
We describe patients to define psychopathological features of symptoms.
Results
Early onset obsessive-compulsive disorder often shows atypical features that make the nosographic collocation difficult.
Conclusions
The uncertain border between obsessive ideas, prevailing ideas and psychotic symptoms such as delusions and/or thought disorder, leads to both diagnostic and therapeutic considerations.