This<unk> , also known as a nasoalveolar cyst, is located superficially in the soft tissues of the upper lip. Unlike most of the other developmental cysts, the<unk>  is an example of an extraosseous cyst, one that occurs outside of bone. It will therefore not show up on a radiograph, or an X-ray film.
Nasolabial cyst
Paradental cyst
Epiblepharon
Median mandibular cyst
Acrospiroma
Dentigerous cyst
Nuchal fibroma
Omphalolith