Our case had many unusual features. The site of occurrence of this tumor in the mediastinum is exceedingly rare. To the best of our knowledge, only one more case has been described in the mediastinum. CD34 negativity on IHC is also uncom­ mon. The closest differential diagnosis in our case is the SFT. But in our case, the architectural pattern was typical of lipomatous hemangiopericytoma and wa...

Intracranial hemangiopericytomas (HPC) are rare vascular tumors. They account for 0.4% of primary central nervous system tumors. HPC is more commonly located supratentorially and tends to occur in a younger age group, with average age at presentation of 38-42 years. The tumor was found throughout the entire CNS, usually superficially and closely related to the meninges. Moreover, they have a st...

Hemangiopericytoma (HPC) may develop in every site where the endothelial tissue exits and primarily develops in the skeletal-muscular system or the skin. Adult cases of HPC generally exhibit a benign course. 20-30% of the cases may show a malign course. The tumors that show more than four mitoses, a focal area of necrosis, and increased cellularity on a magnification ×10 are considered as malig...

1 Head and Neck Surgery Resident Hospital Ana Costa, Santos/SP, Brazil. 2 Medical Student Universidade Metropolitana de Santos. 3 MSc in Health Sciences – Graduate Program of the Hospital Heliópolis HOSPHEL, São Paulo/SP. Professor of Surgery Fundação Lusíada UNILUS, Santos/SP. AssistantHead and Neck Surgery Services Hospital Ana Costa and at the Irmandade da Santa Casa da Misericórdia de Santo...