ESTRO 2022 - Abstract Book

S631

Abstract book

ESTRO 2022

Conclusion Our data suggest that OS was not related to any factor but the type of surgery, tumor location and tumor grade were significantly effective on PFS. Salvage RT had positive impact on OS.

MO-0720 The Role of Radiotherapy in Intracranial Hemangiopericytoma: TROD CNS Group Study 07-008

N. Kaydıhan 1 , Y. Güney 2 , G. Yazıcı 3 , P. Erpolat 4 , S. Kamer 5 , B.M. Atasoy 6 , D. Aslan 7 , B. Atalar 8 , F. Demircio ğ lu 9 , F. Öner Dinçba ş 1 , M. Kırlı Bölükba ş 10 , R. Aksu 11 , S. Tabak Dinçer 12 , Y. Bölükba ş ı 13 1 Memorial Bahçelievler Hospital, Radiation Oncology, Istanbul, Turkey; 2 Memorial Ankara Hospital, Radiation Oncology, Ankara, Turkey; 3 Hacettepe University, Radiation Oncology, Ankara, Turkey; 4 Gazi University, Radiation Oncology, Ankara, Turkey; 5 Ege University, Radiation Oncology, İ zmir, Turkey; 6 Marmara University, Radiation Oncology, Istanbul, Turkey; 7 Erciyes University, Radiation Oncology, Kayseri, Turkey; 8 Acıbadem University, Radiation Oncology, Istanbul, Turkey; 9 Kartal Dr. Lutfi Kırdar City Hospital, Radiation Oncology, Istanbul, Turkey; 10 Bakırköy Sadi Konuk Hospital, Radiation Oncology, Istanbul, Turkey; 11 Gazi Ya ş argil Hospital, Radiation Oncology, Diyarbakır, Turkey; 12 Cemil Ta ş cıo ğ lu City Hospital, Radiation Oncology, Istanbul, Turkey; 13 Koç University, Radiation Oncology, Istanbul, Turkey Purpose or Objective Objective: Intracranial hemangiopericytomas are rare CNS tumors. Adjuvant radiotherapy(RT) is frequently performed after surgery, depending on tumor size, location and type of resection. Moreover RT is preferred as an effective treatment for local recurrence and metastasis. It was aimed to evaluate the clinical outcomes of intracranial hemangiopericytoma. Materials and Methods Materials-Methods: Patients aged 16 years and older who underwent RT with the histologically confirmed intracranial hemangiopericytoma were evaluated retrospectively. 36 patients from 13 institutions were included. RT was performed in