Paraneoplastic digital thrombosis: a case report.

Persistent digital ischemia is an uncommon paraneoplastic syndrome. We describe a 71-year-old man whose only manifestation of an underlying adenocarcinoma was digital ischemia. His symptoms responded dramatically to bilateral dorsal sympathectomies. A thorough search for the mechanism producing the ischemia failed to provide an explanation. We assume that unknown neurohumoral factors produced by the tumor were responsible.