Rare solid and cystic presentation of hemangiopericytoma/ solitary fibrous tumor: A case report

Hemangiopericytoma/Solitary Fibrous Tumor (HPC/SFT) is a rare fibroblastic sarcoma characterized by hyper-vasculature and STAT6 trans-nuclear localization. Cystic HPC/SFT extremely rare. Due to the scarcity of cystic cases, diagnostic treatment guidelines are not well established. To our knowledge, we present first case observed in liver. In addition, patient had over 6 years recurrent hypervascular solid brain, bone, leptomeninges, liver lung prior developing HPC/SFT. Briefly, 37-year-old Caucasian female with history presented several enlarging hepatic lesions on surveillance MRI. The cystic/nonenhancing nature these metastases were confirmed contrast-enhanced ultrasound. uncertainty, two cysts removed laparoscopically pathology high MIB-1 index. Previously, 2014, was diagnosed intracranial grade III pseudopapillary mesenchymal posterior fossa underwent subtotal resection followed external beam radiation. 2017, she intracranial, vertebral, intraspinal intradural extramedullary HPC/SFTs surgery, proton therapy, SRS radiotherapy. 2019, after an uneventful pregnancy birth, routine revealed requiring extended right hepatectomy. 2020-2021 found treated microwave ablation. Shortly afterwards, rapidly growing developed. Of note, has taken any systemic indicating tumors from rather than degradation as sequela therapy. Overall, this highlights that metastasis potential clinical manifestation Moreover, can co-exist more typical primary same patient. Lastly, higher growth rate propensity metastasize compared equivalent.