Our resident, Dr. Shusuke Yamamoto has now published his original paper entitled “Is Quasi-moyamoya Disease a Uniform Disease Entity? A Three-DImensional Constructive Interference in Steady State Imaging Study” in Journal of Stroke and Cerebrovascular Diseases. Based on 3D-CISS imaging, quasi-moyamoya disease or moyamoya syndrome should be divided into two different disease entities. A certain subgroup of MMD patients may be misdiagnosed as quasi-MMD because of the patients’ comorbid disorders and mixed up with the patients who present angiographic findings similar to MMD in spite of the lack of arterial shrinkage.