Most of the 6 mm cysts in the right hippocampal region are congenital developmental anomalies. Most cysts in the right hippocampus are caused by genetic abnormalities or fetal developmental abnormalities. These congenital cysts are usually small, develop more slowly, and mostly stop growing in adulthood, usually without causing overly serious symptoms. If the cyst is congenitally large or if the cyst continues to grow and presses on the brain tissue, resulting in symptoms such as severe headaches, blurred vision, dizziness, etc. due to increased brain pressure, prompt surgical removal of the cyst is recommended. If the cyst does not cause symptoms or is small, surgery can be avoided and continued observation is sufficient. Patients with a 6 mm cyst in the right hippocampus are advised to seek prompt medical attention to assess the severity of their condition under the guidance of a doctor and to seek targeted treatment.