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Pathological Evaluation of Radiation-Induced Vascular Lesions of the Brain: Distinct from De Novo Cavernous Hemangioma

Authors
 차윤진 ; 고지은 ; 김세훈 ; 신현주 ; 장종희 ; 조남훈 
Citation
 Yonsei Medical Journal, Vol.56(6) : 1714~1720, 2015 
Journal Title
 Yonsei Medical Journal 
ISSN
 0513-5796 
Issue Date
2015
Abstract
PURPOSE: We aimed to evaluate the histologic and radiologic findings of vascular lesions after stereotactic radiosurgery (SRS) categorized as radiation-induced cavernous hemangioma (RICH). MATERIALS AND METHODS: Among 89 patients who underwent neurosurgery for cavernous hemangioma, eight RICHs from 7 patients and 10 de novo CHs from 10 patients were selected for histopathological and radiological comparison. RESULTS: Histologically, RICHs showed hematoma-like gross appearance. Microscopically, RICH exhibited a hematoma-like area accompanied by proliferation of thin-walled vasculature with fibrin deposits and infiltrating foamy macrophages. In contrast, CHs demonstrated localized malformed vasculature containing fresh and old clotted blood on gross examination. Typically, CHs consisted of thick, ectatic hyalinized vessels lined by endothelium under a light microscope. Magnetic resonance imaging of RICHs revealed some overlapping but distinct features with CHs, including enhancing cystic and solid components with absence or incomplete popcorn-like appearance and partial hemosiderin rims. CONCLUSION: Together with histologic and radiologic findings, RICH may result from blood-filled space after tissue destruction by SRS, accompanied with radiation-induced reactive changes rather than vascular malformation. Thus, the term "RICH" would be inappropriate, because it is more likely to be an inactive organizing hematoma rather than proliferation of malformed vasculature.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/141724
DOI
10.3349/ymj.2015.56.6.1714
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Radiology
1. 연구논문 > 1. College of Medicine > Dept. of Pathology
1. 연구논문 > 1. College of Medicine > Dept. of Neurosurgery
Yonsei Authors
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