Tag: Odontogenic Keratocyst

Odontogenic Keratocyst

Odontogenic keratocyst

Q. 1 Which of the following jaw cyst is pre-malignant?

 A

Nasopalatine cyst

 B

Radicular cyst 

 C

Odontogenic keratocyst

 D

Dentigerous cyst

Q. 1

Which of the following jaw cyst is pre-malignant?

 A

Nasopalatine cyst

 B

Radicular cyst 

 C

Odontogenic keratocyst

 D

Dentigerous cyst

Ans. C

Explanation:

Ans. c. Odontogenic keratocyst

Odontogenic keratocysts are characterized by an epithelial lining that is parakeratinized and stratified. It is characterized by basal layer of neatly arranged, palisaded, columnar and cuboidal cells above which are several layers of squamous epithelium. This lining has a high mitotic rate and rarely may become dysplastic and develop into squamous cell carcinomas. “- Scott-Brown’s Otorhinolaryngology 

Nasopalatine duct cyst:

  • Relatively common non-odontogenic, developmental cyst
  • Arises from embryonic remnants of the nasopalatine duct
  •  Occurs in palatal midline behind the maxillary central incisors in the region of incisive canal
  • Usually asymptomatic; may be associated with salty discharge
  • Surgical enucleation via palatal flap is treatment of choice

Radicular cyst (Periapical cyst):

  • Most common type of jaw cyst
  • Develops at the apex of an infected, nonvital tooth
  • Bimodal incidence within the 3rd and 6th decade
  • Rarely seen in primary dentition
  • Usually presents as radioluscent lesion around the apex of a tooth root
  • Lined by proliferative epithelium of the non-keratinizing type with an intense inflammatory infiltrate
  • Normally resolve spontaneously if the infection in the associated tooth is controlled by root canal therapy
  • For persisting and larger lesion: Enucleation
  • Dentigerous Cyst:
  • 2nd Most common type of jaw cyst
  • Arises from unerupted teethQ
  • MC in lower 3rd molars
  • Cyst also contain unerupted teethQ
  • X-ray shows: Unilocular cyst or soap bubble appearanceQ
  • Treatment of choice: Enucleation

Odontogenic Keratocyst

  • Odontogenic keratocyst is locally aggressive and has a high rate of recurrenceQ.
  • Most often diagnosed in patients between 10-40 yearsQ.
  • Occur most commonly in males within the posterior mandible, particularly in the region of 3rd molar toothQ.
  • Radiographically present as well-defined unilocular or multilocular radiolucencies
  • Odontogenic keratocysts are characterized by an epithelial lining that is parakeratinized and stratified.
  • It is characterized by basal layer of neatly arranged, palisaded, columnar and cuboidal cells above which are several layers of squamous epithelium. This lining has a high mitotic rate and rarely may become dysplastic and develop into squamous cell carcinomaQ.

Treatment:

  • Aggressive and complete removal of the lesion
  • Recurrence rates for inadequately removed lesions can reach 60%Q

Quiz In Between



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