ACLY and retinitis pigmentosa 1: Finally, anticardiolipin (aCl) antibodies have been studied in this context,yielding conflicting results.19,20 RP iscaused by vasospasm of the small muscular arteries and arterioles of the digits,not by thrombosis.19Nevertheless thrombotic events may complicate severe forms with sustainedvasospasm; patients affected by recalcitrant disease may benefit fromanticoagulant therapy.9Vayssairat et al.20 found asignificantly higher prevalence of aCL IgG in patients with RP and connectivetissue disorders than in healthy controls.