Nasolabial cyst

Nasolabial cyst is a rare non-odontogenic cyst that occurs in the nasolabial fold, also known as the "smile line," or the line that runs from the side of the nose to the corner of the mouth. It is also known as Nasoalveolar cyst, Klestadt’s cyst, or mucoid cyst.

Etiology

The exact cause of the nasolabial cyst is not known. However, it is believed to originate from the remnants of the nasolacrimal ducts. The cyst is filled with a thick, mucoid fluid and is lined by a pseudostratified columnar epithelium.

Clinical Features

Nasolabial cysts are more common in women than in men, and they typically occur in the fourth to sixth decade of life. The cysts are usually asymptomatic but can cause facial swelling and discomfort if they become large. They are typically located on one side of the face, but bilateral cases have been reported.

Diagnosis

The diagnosis of a nasolabial cyst is typically made based on the clinical presentation and imaging studies. Ultrasound, CT, and MRI can be used to visualize the cyst and rule out other conditions. A definitive diagnosis can be made with a histopathological examination after surgical removal of the cyst.

Treatment

The treatment of choice for a nasolabial cyst is surgical removal. This can be done through an intraoral or extraoral approach, depending on the size and location of the cyst. The prognosis after surgical removal is excellent, with a low recurrence rate.

See Also

• Odontogenic cyst
• Nasolacrimal duct
• Nasolabial fold