Tuberous sclerosis complex (TSC) is a genetic disease that mostly affects the brain, skin, kidneys, eyes, heart and lungs. Various neuropsychiatric comorbidities such as mental retardation, mood disorders, anxiety disorders, disruptive/ aggressive behavior disorders, autism spectrum disorders have been reported. In this study, we report a 15-year old case of with an obsessive compulsive disorder and TSC who is the youngest case in the literature. His sexual and religious obsessions first started when he was 10 years old. In this paper, his medical and psychiatric history and treatment management are presented.