Other cysts of the jaw

Disease Description (Causes and Symptoms)

• Definition summary: A cyst that develops inside the jawbone (maxilla or mandible), with fluid or necrotic material filling the cystic cavity, potentially destroying and expanding bone tissue.
• Main causes:
  • Periapical irritation caused by pulp necrosis (e.g., radicular cyst/periapical cyst)
  • Cysts associated with the soft tissue surrounding an erupted tooth crown (eruption cyst)
  • Cysts attached to the crown of an unerupted (impacted) tooth (dentigerous cyst/odontogenic cyst)
  • Development from remnants present before or during tooth formation (e.g., primordial cyst)
  • Some are associated with embryonic remnants (e.g., thyroglossal duct remnants)
  • Also includes types with different pathological characteristics, such as odontogenic keratocyst (OKC)
• Pathophysiology: An epithelial-lined cystic cavity can cause increased internal pressure and bone resorption, leading to expansion of the jaw and displacement or resorption of teeth. Some types are invasive or have a high recurrence rate.
• Symptoms: Most are asymptomatic and are discovered incidentally on imaging studies. When symptoms occur, they may include localized swelling (of the face or gums), pain (when infected), tooth mobility or displacement, sensory changes (with large lesions), and fistula formation into the maxillary sinus or nasal cavity.

Treatment Methods and Precautions

• Diagnosis: Panoramic and periapical radiographs are basic examinations, and CT/CBCT imaging is recommended to assess the extent of the lesion. A biopsy (pathological examination) during surgery is required for definitive diagnosis.
• Surgical treatment (standard):
  • Enucleation (excision): Removal of the entire cystic lesion. This is the usual treatment for small- to medium-sized lesions.
  • Marsupialization (decompression): When the lesion is very large, an opening is created, the contents are removed, and the lesion is decompressed to reduce its size, followed by subsequent excision.
  • Peripheral ostectomy or use of Carnoy's solution (an adjunctive method, particularly for lesions with a high risk of recurrence, such as odontogenic keratocysts)
  • Partial resection (extensive resection) may be necessary for extensive lesions or when malignant features are suspected.
• Conservative/dental treatment: If there is a causative tooth, root canal treatment (endodontic treatment) or extraction may be performed concurrently. If infection is present, antibiotics and drainage are performed before definitive treatment.
• Medication and supportive treatment: When infection is present, antibiotics (as prescribed by a doctor), analgesics for pain control, and postoperative antibiotics and oral hygiene care.
• Precautions (risk of complications): Surgery may cause sensory changes due to nerve damage to adjacent teeth, fistula formation or nosebleeds involving the maxillary sinus or nasal cavity, fracture (particularly with large lesions), secondary infection, and recurrence (particularly with OKC and similar lesions).
• Prognosis: In general, the prognosis is good after appropriate surgical treatment. However, recurrence rates vary depending on the type of lesion; odontogenic keratocysts and similar lesions have a particularly high risk of recurrence. Long-term follow-up is necessary.

Outpatient Visit Checklist (Including Preparation Items and Sample Questions)

• Recommended items to bring:
  • A list of current medications (including anticoagulants) and a history of allergies
  • Previous dental and oral/maxillofacial imaging materials (panoramic radiographs, CT/CBCT, etc.) and copies of medical records, if available
  • Notes summarizing when symptoms began and their progression (swelling, pain, redness, fever, sensory changes, etc.)
  • Photographs of the affected area (if there is external swelling)
• Items to prepare for the medical history and examination: Recent fever or infection symptoms, history of dental treatment (whether you have had previous extractions or restorative treatment), underlying conditions that may affect recovery such as smoking or diabetes, and whether you are pregnant
• Information to tell the doctor in advance during the outpatient visit: Whether you are taking anticoagulants, whether you are taking immunosuppressants, and whether you have recently used antibiotics

General Sample Questions to Ask the Doctor

• "What is the exact type of this cyst (diagnosis)? When will I receive the biopsy results?"
• "Is surgery necessary, and what treatment method do you recommend? Are there alternative treatment options?"
• "How high is the risk of nerve damage (sensory changes) during or after surgery?"
• "How long will recovery take, and what should I be careful about in daily life?"
• "What is the risk of recurrence, and what interval do you recommend for follow-up (radiographic examinations)?"

Sample Condition-Specific Questions

• "Is this cyst directly associated with a particular tooth (for example, a tooth that needs to be extracted)? Can that tooth be preserved, or does it need to be extracted?"
• "The lesion is adjacent to the maxillary sinus or nasal cavity. Is there a risk of a fistula (opening) or a connection with the nose after surgery? If so, how would it be managed?"

(Note: Commonly included synonyms encompass various types of oral and maxillofacial cysts, including eruption cysts, primordial cysts, odontogenic keratocysts, and periodontal cysts. Imaging findings and biopsy results are important in determining the treatment strategy. )