Radiographic Cyst & Benign Tumours in Jaw Flashcards
Which of the following is a possible diagnosis for the lesion shown?
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Ameloblastoma
Cementoblastoma
Osteosarcoma
SCC
Ameloblastoma
A 25 y.o. male came into a dental clinic for a wisdom tooth extraction. As a pre-op protocol, the dentist took an OPG on that visit to get a general overview of the patient’s teeth and to see the location and orientation of the wisdom teeth relative ot other stuctures in the jaw. The doctor notices an increased radiopacity surrounding the apex of #36 and decided to take a posterior PA to see that region clearer. Upon clinical examination, the tooth #36 and #37 shows signs of being vital. The dentist proceeded with the extraction of #38. After the surgery told the patient about the radiographic findings and asked him to monitor the lower left side of his jaw. 10 years later, the same patient came to the same clinic for his regular cleaning. The dentist suddenly remembered about the radiopacity around his #36 and decided to take another PA. The lesion had not changed in size. The patient denied any pain around the region. What is the most likely diagnosis made by the dentist and why?
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Diagnosis: malignant tumour as the lesion has ill-defined borders and it encroaches to the space around the roots of #36 and #37
Diagnosis: enostosis as the lesion is uniformly radiopaque and has well-defined borders. More importantly, it failed to demonstrate cortical expansion and continued growth over time.
Diagnosis: condensing osteitis as the lesion is radiopaque and is located around the apex of tooth #36 and #37. The lesion is associated with the presence of amalgam restoration on the occlusal surface of the tooth.
Diagnosis: Cementoblastoma as the lesion appears as a radiopaque mass that is fused to one or more tooth roots The outline of the root or roots of the involved tooth is also obscured by root resorption and fusion of the tumor with the tooth.
Diagnosis: enostosis as the lesion is uniformly radiopaque and has well-defined borders. More importantly, it failed to demonstrate cortical expansion and continued growth over time.
Certain cysts and benign tumors may present themselves as multilocular lesions on radiographs. Which of the following is not a possible differential diagnosis for multilocular lesions observed radiographically?
Odontogenic myxoma
Ameloblastoma
CGCG (Central Giant Cell Granuloma)
Cementoblastoma
Cementoblastoma
A patient walks in complaining of discomfort in his right jaw. After taking an OPG, you notice that there are multilocular lesions along the entire right body of mandible. The cortical boundaries of the right mandible are also disrupted by the expansile lesions. Root resorption is observed in all the adjacent teeth. Which of the following could be a possible diagnosis?
Ameloblastic fibro-odontoma
Dentigerous cyst
Dense bone island
Odontogenic myxoma
Odontogenic myxoma
A patient’s radiograph depicts a large, well-defined radiolucent lesion with thick corticated borders at the angle of the mandible. It is multilocular with an internal ‘soap bubble’ septation, and seems to be expanding into surrounding structures. What is the most likely diagnosis?
Stafne bone defect
Odontogenic myxoma
Ameloblastoma
Odontoma
Ameloblastoma
which is the most likely differential diagnosis?
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Ameloblastoma
adenomatoid odontogenic tumour
odontogenic keratocyst
simple bone cyst
Ameloblastoma
Which of these radiographic descriptions of cysts correspond to a dentigerous cyst?
Seen at the buccal bifurcation of the mandibular first molar
Scalloping shape expanding in the anterior-posterior direction within the jaw
Seen at the lower premolar region on the lateral surface of roots
Associated with the crown of an impacted tooth, attaching at the cementoenamel junction
Associated with the crown of an impacted tooth, attaching at the cementoenamel junction
A radiograph of a patient who is about 40 years old shows a lesion that is:
1. radiolucent
2. well-defined and has thick corticated borders
3. multi-locular with an internal honeycomb pattern, with thick and curved septae
4. very expansile with extensive root resorption and tooth displacement
Which of the following is the most likely diagnosis?
Cemento-blastoma
Odontongenic Myxoma
Osteoma
Ameloblastoma
Ameloblastoma
A 50-year-old man walks into your clinic asking about swelling he noticed on his palate in the midline. You see that there is a dome-shaped bluish enlargement overlying the incisive canal (just posterior to central incisors). The swelling is asymptomatic and doesn’t cause the patient any pain. What is your differential diagnosis?
Radicular/periapical cyst
Lateral radicular cyst
Lateral periodontal cyst
Nasopalatine duct cyst
Nasopalatine duct cyst
Which of the following correctly describes ameloblastoma
Predilection for maxilla
Appears radiopaque in radiograph
It is malignant in most cases
Treatment option includes en bloc resection
Treatment option includes en bloc resection
Which of the following does not describe radicular cyst?
It is always associated with non vital teeth
It affects PDL space or lamina dura
It is commonly multilocular
It is the most common cyst in the jaw
It is commonly multilocular
What kind of epithelial lining would a dentigerous cyst present with?
Non-keratinised, stratified squamous epithelium
Keratinised, stratified squamous epithelium
Non-keratinised, columnar epithelium
Keratinised, columnar epithelium
Non-keratinised, stratified squamous epithelium
A 55 year old man presents into your dental clinic for a wisdom tooth extraction. However, after taking a DPT, you discovered a radiolucency at the #34-#35 region, and decided to take a PA as seen below. What is the most likely differential diagnosis?
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Dentigerous cyst
Lateral periodontal cyst
Odontogenic keratocyst
Simple bone cyst
Lateral periodontal cyst
Which of these following statements about cyst and benign tumours in the jaw are false
Dense bone island and condensing osteitis can be differentiated with vitality test.
Ameloblastoma is an expansile tumour that commonly results in tooth displacement and resorption
Cementoblastoma is often associated with maxillary molars and central incisors
Multiple osteomas and dense bone island is associatrd with Gardner’s syndrome
Cementoblastoma is often associated with maxillary molars and central incisors
Which of the following would not be a suitable differential diagnosis?
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A) Ameloblastoma
B) CGCG (central giant cell granuloma)
C) Odontogenic myxoma
D) Florid osseous dysplasia
D) Florid osseous dysplasia
