Primordial Cyst Of The Mandible

Primordial Cyst Of The Mandible

Question. Write a short note on primordial cyst.
Answer. It is the type of odontogenic cyst.

Recent concept: The term primordial cyst is not in use nowadays because it is considered to be an odontogenic keratocyst.

Primordial Cyst Clinical Features 

• It is found in children and young adults between 10–30 years of age; it may persist in older age groups.
• It can arise in any portion ofthe jaw, mostly seen in the ascending ramus of the mandible in the third molar area.
• It enlarges painlessly and slowly replaces large portions of cancellous bone before expansion of cortical plates.
• Pain is associated with a large cyst caused by infection that may follow perforation of the expanded cortical plate.

Primordial cyst of the mandible

Primordial Cyst Radiographic Features 

• Cyst-like radiolucency that is well-defined and has hyperostotic borders.
• Internal structure is unilocular or has a scalloped outline, which gives the unilocular appearance.
• Teeth produce deflection of the adjacent tooth root, but seldom cause root resorption.

Primordial Cyst Differential Diagnosis 

• Ameloblastoma: Occurs in old age. It is multilocular, but at times, it can be unilocular. It presents with paresthesia.
• Residual cyst: A History of tooth extraction is present.
• Traumatic cyst: The Margins of a traumatic cyst are scalloped, while the margins of a primordial cyst are hyperostotic.
• Giant cell granuloma: This is commonly present in the anterior part of the jaw.
• Giant cell lesion of hyperparathyroidism: It is ruled out based on serum investigations.

Unilocular radiolucency in the mandible

Primordial Cyst Management

• Surgical enucleation.
• Regular check-up due to high recurrence.