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WorksheetsOdontogenic Keratocyst (OKC) Quiz
Total questions: 15
Worksheet time: 8mins
Who first coined the term Odontogenic Keratocyst (OKC)?
Robinson
Philisen
Mikulicz
John Hunter
In which year was OKC reclassified and renamed as keratocystic odontogenic tumor (KCOT) by WHO?
1971
1992
2005
2017
What is the characteristic lining of OKC according to WHO?
Pseudostratified columnar epithelium
Transitional epithelium
Parakeratinised stratified squamous epithelium
Ciliated columnar epithelium
What is the peak incidence age range for OKC?
3rd and 5th decade
2nd and 4th decade
4th and 6th decade
1st and 3rd decade
Which syndrome is associated with multiple OKC?
Down syndrome
Marfans syndrome
Klinefelter syndrome
Turner syndrome
What is the radiological type of OKC which forms in the place of normal teeth?
Collateral type
Extraneous type
Envelopmental type
Replacement type
What is the MRI finding in Keratocystic odontogenic tumors?
T1: high signal, T2: heterogeneous signal, DWI: restricts
T1: high signal, T2: low signal, DWI: restricts
T1: low signal, T2: high signal, DWI: restricts
T1: low signal, T2: high signal, DWI: does not restrict
What is the treatment modality for OKC that involves enucleation with or without curettage and marsupialization?
Chemotherapy
Surgical treatment
Aggressive treatment
Conservative treatment
What is the composition of Carnoy’s solution used after enucleation?
2ml chloroform, 5ml of absolute alcohol, 2ml of glacial acetic acid, 1gm of ferric chloride
4ml chloroform, 7ml of absolute alcohol, 1ml of glacial acetic acid, 2gm of ferric chloride
3ml chloroform, 6ml of absolute alcohol, 2ml of glacial acetic acid, 1gm of ferric chloride
3ml chloroform, 6ml of absolute alcohol, 1ml of glacial acetic acid, 1gm of ferric chloride
What is the purpose of liquid nitrogen therapy after enucleation of KCOT?
To stimulate cell proliferation and increase recurrence rate
To devitalize bone in situ and leave osseous inorganic framework untouched
To reduce scarring and act as a haemostasis agent
To promote healing and decrease risk of pathological fracture
What is the primary purpose of marsupialization (decompression) in the treatment of OKC?
To convert the cyst into a pouch and decompress it
To remove the entire cyst and its envelope
To apply liquid nitrogen to the cystic cavity
To perform resection of the cyst
What is the main disadvantage of Marsupialization with Cystectomy (Waldron’s method)?
Is not effective in treating large cysts
Has a high recurrence rate
Requires two surgeries for the patient
Causes pathological fractures
What is the recurrence rate of OKC/KCOT after resection?
0%
38%
9%
18%
What is the main histological feature of OKC according to Pindborg, Phillipsen, and Henriksen?
Surface keratinisation with parakeratosis
Satellite cysts and daughter cysts
Lacks of rete ridges/pegs
Solid epithelial proliferation
What is the incidence of the Orthokeratinizing odontogenic cyst (OOC) variant of OKC?
2.2%
47.8%
12.2%
86%
