The anterior horn of the lateral ventricle refers to the forward portion of the interventricular foramen. The anterior horn of the lateral ventricle, also known as the frontal horn of the lateral ventricle, is the part of the lateral ventricle that extends into the frontal lobe. Therefore, the anterior horn of the lateral ventricle is a component of the lateral ventricle and is a normal lateral ventricular anatomy. The morphology, size, and width of the anterior horn of the lateral ventricle can be observed by CT or MRI of the head, and what can be determined is whether the anterior horn is normal or not. If there is a tumor, infarction or hemorrhage in the frontal lobe, it can cause compression of the anterior horn on one side, resulting in narrowing of the anterior horn of the lateral ventricle. If frontal lobe atrophy is present, there may also be widening of the anterior horn of the lateral ventricle. If there is a tumor or cyst in the lateral ventricle, it can also cause deformation of the anterior horn of the lateral ventricle. Therefore, by observing the morphological changes in the anterior horn of the lateral ventricle, the exact cause and nature of the lesion can be effectively determined.