[Cerebral venous sinus thrombosis resulting in cerebral infarction due to deep venous stasis during long-term follow-up after initiation of thrombopoietin receptor agonist therapy: a case report].

The case involves a 60-year-old female with a history of more than five years of treatment with a thrombopoietin receptor agonist (TPO-RA) for idiopathic thrombocytopenic purpura (ITP). She presented to our hospital with complaints of headache and left hemiparesis. Diffusion-weighted MRI of the head showed mild hyperintensity from the right thalamus to the basal ganglia, suggesting edematous changes. The patient was diagnosed with cerebral venous sinus thrombosis caused by thrombocytopenia induced by TPO-RA therapy. It is necessary to consider that there is a risk of thrombosis not only in the early stages after starting TPO-RA therapy but also in cases such as this one, even after a long period of time.