Cysts represent pathological cavities, filled with cystic content, which contain an epithelial and connective lining. Depending on the origin of the epithelium, cysts can be either odontogenic or non-odontogenic. As evident from the name, non-odontogenic cysts develop from the epithelium of non-odontogenic origin, i.e., the tissue that does not partake in tooth development. Even though they are less common than odontogenic cysts, knowing their behavior and origin is equally important in order to determine a correct diagnosis and choose an appropriate treatment. In most cases, they indicate asymptomatic growth, which is why they are commonly found during routine check-ups. The exact etiology is still unclear, even though there are several theories that fairly accurately explain their cause. They are treated surgically. Over time, the classification has changed, and today we use the classification system created by the World Health Organization in 2017. According to that classification, only the nasopalatine cyst belongs to the non-odontogenic cyst group. Jaw cavities, which do not have an epithelial lining, are called pseudocysts. The static bone cavity, the idiopathic bone cavity and the aneurysmatic bone cyst belong to the same group. However, the last one is currently classified as a gigantocellular change due to the presence of giant cells. Because it is difficult to radiologically differentiate them from other cystic and tumorous formations, the final diagnosis is made on the basis of pathohistological testing.