Hypothalamic Pilocytic Astrocytoma Presenting with Intratumoral and Subarachnoid Hemorrhage —Case Report—

Abstract

A 45-year-old male presented with sudden onset of severe headache. Computed tomography and magnetic resonance imaging demonstrated an irregularly enhanced suprasellar mass with intratumoral and subarachnoid hemorrhage. The mass was removed in two operations. Histological examination of the tumor revealed pilocytic astrocytoma. The relatively rich vascularity and perivascular tumor cell proliferation observed in this benign lesion were probably the causes of this extremely rare association.

Chiasm and optic nerve glioma manifested as hemorrhage (two clinical cases and a literature review)

“…Спонтанные крово-излияния, ассоциированные с оптической глиомой, еще большая редкость. Частота встречаемости соче-тания глиомы низкой степени злокачественности и кровоизлияния не превышает 4-12% [14]. У взрос-лых кровоизлияния прослеживаются чаще, чем у де-тей, что сопряжено с гистологическими особенно-стями опухолей.…”

Pilomyxoid Astrocytoma: Expanding the Imaging Spectrum

“…[18][19][20][21][22][23][24][25][26][27][28] Until recently the rate of hemorrhage in PA was estimated at Ͻ1%. However, a recent retrospective series of 134 patients with a tissue diagnosis of PA found an 8% spontaneous hem- orrhage rate, much higher than that previously reported.…”

Massive Intracranial Hemorrhage Associated With Pleomorphic Xanthoastrocytoma -Case Report-

“…10) Only a few cases of hemorrhage associated with lowgrade astrocytomas have been reported. 2,4,5,14,17,20) Possible causes of intratumoral hemorrhage include endothelial proliferation with vascular obliteration, vessel compression and/or distortion due to rapid tumor growth, vascular necrosis, abnormal structure of tumor capillaries such as retiform capillaries, and invasion of vessel walls by the tumor. 7,13,16,20) However, which histological features and what mechanisms actually cause such bleeding remain unclear.…”