Diagnostic and therapeutic problems of Sneddon's syndrome are reviewed on the basis of the observation of a pregnant 36-year-old female. She had had Hodgkin's disease stage I, curatively treated when she was 23 years old. She developed cerebral ischemic events, initially ascribed to isolated cerebral angiitis, associated with progressive dermatological lesions (generalised livedo racemosa). A temporal artery biopsy did not reveal giant cell angiitis, while the cutaneous arterioles in a biopsy showed marked intimal proliferation without inflammatory cell infiltration. The literature on Sneddon's syndrome is reviewed.