Intracranial hypertension is a potentially life-threatening condition that can occur secondary to various intracranial pathologies, including primary brain tumors. Magnetic resonance imaging (MRI) offers a non-invasive method for identifying anatomical changes associated with increased intracranial pressure. Understanding the correlation between radiologic findings and tumor pathology is essential for timely diagnosis and management. To determine the radiologic findings of intracranial hypertension secondary to primary intracranial tumors and to demonstrate the relationship between tumor pathology and radiologic findings. A total of 105 adult patients with histopathologically confirmed primary intracranial tumors were included in this retrospective study. Tumor characteristics and MRI findings related to intracranial hypertension were recorded. The relationship between the type of tumor and the radiologic findings was evaluated. Glioblastoma (41.0%), followed by meningioma (29.5%), was the most common primary brain tumor. There was a statistically significant difference between intraaxial tumors and extraaxial tumors in terms of pituitary gland height (p = 0.016) and sinus invasion area of the tumor (p = 0.010). In the subgroup analysis, there was a significant difference between meningioma, the most common extraaxial tumor, and other tumors in terms of pituitary gland height and dural sinus invasion area (p = 0.008 and p = 0.029, respectively). It is important to know the radiological findings of secondary intracranial hypertension caused by intracranial masses and to keep in mind that it may be associated with tumor pathology, and some secondary intracranial hypertension findings may be detected more frequently in extraaxial tumors.