Splenic Artery Aneurysm Associated with Myelofibrosis Managed by Coil Embolization.

Myelofibrosis (MF) is a myeloproliferative neoplasm frequently complicated by splenomegaly, with vascular abnormalities, such as splenic artery aneurysm (SAA), rarely reported. We herein report a 74-year-old woman with secondary MF harboring a JAK2 V617F mutation who developed SAA requiring intervention because of its potential risk of rupture. Ruxolitinib therapy markedly reduced splenomegaly and improved constitutional symptoms, thereby optimizing hemodynamic conditions and overall status for safe spleen-preserving coil embolization. This case highlights the potential relationship between MF and aneurysm formation while demonstrating that concomitant Janus kinase inhibitor therapy may facilitate safe endovascular treatment in select patients.