Cancer and stroke: commonly encountered by clinicians, but little evidence to guide clinical approach.

Woock, Malin; Martinez-Majander, Nicolas; Seiffge, David J; Selvik, Henriette Aurora; Nordanstig, Annika; Redfors, Petra; Lindgren, Erik; Sanchez van Kammen, Mayte; Rentzos, Alexandros; Coutinho, Jonathan M; Doyle, Karen; Naess, Halvor; Putaala, Jukka; Jood, Katarina; Tatlisumak, Turgut (2022). Cancer and stroke: commonly encountered by clinicians, but little evidence to guide clinical approach. Therapeutic advances in neurological disorders, 15, p. 17562864221106362. Sage 10.1177/17562864221106362

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The association between stroke and cancer is well-established. Because of an aging population and longer survival rates, the frequency of synchronous stroke and cancer will become even more common. Different pathophysiologic mechanisms have been proposed how cancer or cancer treatment directly or via coagulation disturbances can mediate stroke. Increased serum levels of D-dimer, fibrin degradation products, and CRP are more often seen in stroke with concomitant cancer, and the clot retrieved during thrombectomy has a more fibrin- and platelet-rich constitution compared with that of atherosclerotic etiology. Multiple infarctions are more common in patients with active cancer compared with those without a cancer diagnosis. New MRI techniques may help in detecting typical patterns seen in the presence of a concomitant cancer. In ischemic stroke patients, a newly published cancer probability score can help clinicians in their decision-making when to suspect an underlying malignancy in a stroke patient and to start cancer-screening studies. Treating stroke patients with synchronous cancer can be a delicate matter. Limited evidence suggests that administration of intravenous thrombolysis appears safe in non-axial intracranial and non-metastatic cancer patients. Endovascular thrombectomy is probably rather safe in these patients, but probably futile in most patients placed on palliative care due to their advanced disease. In this topical review, we discuss the epidemiology, pathophysiology, and prognosis of ischemic and hemorrhagic strokes as well as cerebral venous thrombosis and concomitant cancer. We further summarize the current evidence on acute management and secondary preventive therapy.

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