Sneddon syndrome (SS) is a clinical entity corresponding to a non-inflammatory thrombotic vasculopathy that includes livedo reticularis (typical skin lesions) and cerebrovascular lesions. We present here a case of autoimmune SS with dementia and psychosis as the main features that revealed the disease, in a 45-year-old Tunisian man

Schizophrenia is associated to somatic disorders especially cardio-vascular and auto-immune. Through this case report, we describe an association with hypertrophic osteoarthropathy (HPO). For this patient it was a paraneoplastic paraneoplastic syndrome secondary to lung cancer. This syndrome is rare but important to recognize since it could hide a life-threatening condition.