<unk> s, a form of heterotopia, are masses of normal tissues found in abnormal locations. In contrast to a neoplasm or tumor, the growth of a<unk>  is normally regulated. It is different from a hamartoma. The two can be differentiated as follows: a hamartoma is disorganized overgrowth of tissues in their normal location (e.g., Peutz–Jeghers polyps), while a<unk>  is normal tissue growth in an abnormal location (e.g., osseous<unk> , gastric tissue located in distal ileum in Meckel diverticulum).
Choristoma
Nabothian cyst
Dentigerous cyst
Ganglion cyst
Hidrocystoma
Tornwaldt cyst
Epidermoid cyst
Paradental cyst