浙医一院 Clinical Presentation The clinical manifestations of various brain tumors can best be divided into those due to focal compression and irritation by the tumor itself and those attributed to the secondary consequences, namely increased ICP, peritumoral edema, and hydrocephalus. Most commonly, symptoms are caused by a combination of these factorsClinical Presentation The clinical manifestations of various brain tumors can best be divided into those due to focal compression and irritation by the tumor itself and those attributed to the secondary consequences, namely increased ICP, peritumoral edema, and hydrocephalus. Most commonly, symptoms are caused by a combination of these factors