Masayo Ogawa, Kumiko Ando, Yuki Nagami, Ajaya R Pande, Reiichi Ishikura,
Norio Nakao, Kohei Maekawa^1）, Takakuni Tanizawa^1）, Hideyasu Ikemoto^2）, Norio Arita^2）

Department of Radiology, Department of Pediatrics¹）, Department of Neurosurgery^2）, Hyogo College of Medicine

　　Subarachnoid hemorrhage due to ruptured aneurysm accounts for 2％ of non-traumatic intracranial hemorrhage in infants.
　　We herein report an infant case of ruptured intracranial aneurysm in MCA. In addition to MRA, a low attenuation area on pre-contrast CT images and a signal void on T2-weighted images of MRI were useful for depicting the aneurysm within the subarachnoid hemorrhage.

Keywords：Ruptured intra-cranial aneurysm, Infant, CT, MRI