Aspirin-Responsive, Migraine-Like Transient Cerebral and Ocular Ischemic Attacks and Erythromelalgia in JAK2-Positive Essential Thrombocythemia and Polycythemia Vera.

Aspirin-Responsive, Migraine-Like Transient Cerebral and Ocular Ischemic Attacks and Erythromelalgia in JAK2-Positive Essential Thrombocythemia and Polycythemia Vera. Acta Haematol. 2014 Aug 7;133(1):56-63 Authors: Michiels JJ, Berneman Z, Gadisseur A, Lam KH, De Raeve H, Schroyens W Abstract Migraine-like cerebral transient ischemic attacks (MIAs) and ocular ischemic manifestations were the main presenting features in 10 JAK2(V617F)-positive patients studied, with essential thrombocythemia (ET) in 6 and polycythemia vera (PV) in 4. Symptoms varied and included cerebral ischemic attacks, mental concentration disturbances followed by throbbing headaches, nausea, vomiting, syncope or even seizures. MIAs were frequently preceded or followed by ocular ischemic events of blurred vision, scotomas, transient flashing of the eyes, and sudden transient partial blindness preceded or followed erythromelalgia in the toes or fingers. The time lapse between the first symptoms of aspirin-responsive MIAs and the diagnosis of ET in 5 patients ranged from 4 to 12 years. At the time of erythromelalgia and MIAs, shortened platelet survival, an increase in the levels of the platelet activation markers β-thromboglobulin and platelet factor 4 and also in urinary thromboxane B2 were clearly indicative of the spontaneous in vivo platelet activation of constitutively JAK2(V617F)-activated thrombocythemic platelets. Aspirin relieves the peripheral, cerebral a...
Source: Acta Haematologica - Category: Hematology Authors: Tags: Acta Haematol Source Type: research