[Late distant metastases of intracranial hemangiopericytomas]

Hemangiopericytomas are rare tumors which arise from the pericytes of Zimmermann. They can occur anywhere, where capillaries can be found. Seldomly this primitive mensenchymal tumors are found intracranially. The current classification of the World Health Organization (WHO) lists the Hemangiopericytomas as entity of its own and they belong to the mesenchymal non-meningoendothelial tumors. These tumors are very aggressive. They have a high rate of local recurrence and also a high propensity for late distant metastases. The case presented, is an example for these special characteristics with late development of distant metastases in spite of no Local recurrence. The treatment of both, the primary tumor as well as the recurrence and the distant metastases is radical surgery. The post-operative radiation therapy improves the local control of the tumor. Within the frame of the oncological follow-up the diagnostic imaging procedures play the most important role.