F2 and systemic lupus erythematosus: Given that, in many patients, TIA may not become clinically apparent, it could be hypothesized that anti-PS/PT antibodies (present in a lupus patient with quiescent TIA) may lead, over time, to multiple infarcts or to subclinical cerebral flow disturbances, which can predispose to the development of other neuropsychiatric SLE features.