title: Trousseau's syndrome.
abstract: We report 4 cases of Trousseau's syndrome, in which spontaneous recurrent or migratory venous thromboses, arterial emboli caused by nonbacterial thrombotic endocarditis, or both, develop in a patient with a recognized or occult malignant tumor. The clinical course of 3 of the patients emphasizes a key point: The occurrence for no known reason of thromboses preventable by anticoagulation therapy with heparin but not with warfarin sodium should alert a physician to focus diagnostic efforts on uncovering an underlying malignant lesion. Thromboses may occur months to years before the tumor is discovered, and a thorough negative initial examination does not obviate the need for a continuing search. Patients with Trousseau's syndrome have persistent low-grade intravascular coagulation, and therapy with heparin should be continued indefinitely. Stopping heparin therapy for even a day may permit a new thrombosis to develop. Immunostaining a biopsy specimen from 1 patient provided evidence that 2 properties of a neoplastic lesion are required for the syndrome to develop: The malignant cells express surface membrane tissue factor, and structural features of the tumor permit the malignant cells or vesicles it sheds to be exposed to circulating blood.
authors.affiliation: Department of Medicine, University of California, School of Medicine, San Diego, La Jolla.
authors.forename: N
authors.initials: N
authors.lastname: Callander
authors.forename: S I
authors.initials: SI
authors.lastname: Rapaport
mesh_terms: D000328:Adult; D004617:Embolism / Q000188:drug therapy / Q000209:etiology*; D005260:Female; D006493:Heparin / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008875:Middle Aged; D009369:Neoplasms / Q000150:complications* / Q000175:diagnosis; D012008:Recurrence; D013577:Syndrome; D013927:Thrombosis / Q000188:drug therapy / Q000209:etiology*; D014859:Warfarin / Q000627:therapeutic use
chemical_list: D014859:Warfarin; D006493:Heparin