Cystic Lesions of Jaws and Allied Structures
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Questions and Answers

What is the typical radiographic appearance of an odontogenic keratocyst?

  • Mixed radiolucent and radiopaque area
  • Multilocular radiolucent area with typical soap bubble appearance and scalloping border (correct)
  • Unilocular radiolucent area with smooth borders
  • Radiopaque area with irregular borders
  • What is the macroscopic appearance of the cystic cavity in an odontogenic keratocyst?

  • Contains calcifications
  • Smooth and translucent
  • Opaque and white
  • Rough and irregular (correct)
  • Which age group is most commonly affected by odontogenic keratocysts?

  • Elderly individuals over 60 years old
  • Children under 10 years old
  • Adolescents aged 10-15 years old
  • Young adults in the 2nd or 3rd decade of life (correct)
  • Which of the following is NOT a feature of odontogenic keratocysts?

    <p>Causes bone expansion</p> Signup and view all the answers

    What is the prevalence of odontogenic keratocysts according to data reported by WHO 2017?

    <p>$&lt;5 ext{%}$</p> Signup and view all the answers

    In which area are odontogenic keratocysts most commonly found?

    <p>Mandible ramus area</p> Signup and view all the answers

    What is the typical clinical behavior of odontogenic keratocysts?

    <p>Aggressive clinical behavior &amp; high recurrence rate</p> Signup and view all the answers

    What is the typical histopathological lining of odontogenic keratocysts?

    <p>Parakeratinized epithelial lining with no rete peg formation</p> Signup and view all the answers

    What is the radiographic appearance of odontogenic keratocysts?

    <p>Multilocular radiolucent area with soap bubble appearance and scalloping border</p> Signup and view all the answers

    What is the typical age range in which odontogenic keratocysts mostly occur?

    <p>Young adults in the 2nd or 3rd decade of life</p> Signup and view all the answers

    Which type of cyst is associated with a syndrome characterized by multiple keratocysts, bifid ribs, and basal cell carcinoma?

    <p>Odontogenic keratocysts</p> Signup and view all the answers

    Which type of odontogenic cyst has a recurrence rate of about 25% and can be treated with enucleation, marsupialization, or resection?

    <p>Orthokeratinizing odontogenic cyst</p> Signup and view all the answers

    Which non-odontogenic cyst is characterized by being asymptomatic and appearing as a small round or heart-shaped radiolucent area in the midline between maxillary central incisors roots?

    <p>Nasopalatine duct cyst</p> Signup and view all the answers

    What type of cyst presents as a painless swelling in the anterior part of the maxilla with radiographic features of unilocular or multilocular radiolucency with multiple small radiopaque foci?

    <p>Calcifying odontogenic cysts</p> Signup and view all the answers

    Which type of cyst is characterized by an epithelial lining derived from ectoderm involved in facial tissue development?

    <p>Non-odontogenic cysts</p> Signup and view all the answers

    What type of non-odontogenic cyst occurs in the soft tissue of the incisive papilla area without any bony involvement and appears as a bluish swelling discharging a salty fluid?

    <p>Cyst of palatine papilla</p> Signup and view all the answers

    Which type of lesion buds and forms daughter cysts?

    <p>Basal cell lesions</p> Signup and view all the answers

    Which type of lesion is characterized by tall columnar palisaded cells with a tombstone appearance?

    <p>Basal cell lesions</p> Signup and view all the answers

    Which type of cyst is characterized by a fluctuant swelling, bluish appearance, and superficial location?

    <p>Mucous extravasation and retention cysts</p> Signup and view all the answers

    Which cyst develops from remnants of the thyroglossal duct and can cause laryngeal obstruction?

    <p>Thyroglossal tract cyst</p> Signup and view all the answers

    Which type of cyst is caused by increased venous pressure or vascular malformation?

    <p>Aneurysmal bone cyst</p> Signup and view all the answers

    Which type of cyst is characterized by excessive bleeding of dark venous blood during surgery?

    <p>Aneurysmal bone cyst</p> Signup and view all the answers

    Which type of cyst is lined by keratinized squamous epithelium and contains skin appendages?

    <p>Dermoid and epidermoid cysts</p> Signup and view all the answers

    Which type of cyst is characterized by a painful swelling and multilocular radiolucency?

    <p>Aneurysmal bone cyst</p> Signup and view all the answers

    Which type of non-odontogenic soft tissue cyst is mucin-filled and painless?

    <p>Mucous extravasation and retention cysts</p> Signup and view all the answers

    Which benign non-odontogenic soft tissue cyst is slowly growing, painless, and presents as a rubbery swelling?

    <p>Dermoid and epidermoid cysts</p> Signup and view all the answers

    Study Notes

    • Text discusses various types of cysts in the jaws and allied structures
    • Aneurysmal bone cyst: occurs above inferior dental canal, no lining, thin connective tissue, caused by increased venous pressure or vascular malformation, radiolucent, multilocular, painful swelling, excessive bleeding of dark venous blood during surgery
    • Non-odontogenic soft tissue cysts: mucous extravasation and retention cysts, dermoid and epidermoid cysts, branchial cleft (lymphoepithelial) cysts, salivary gland cysts
    • Mucous extravasation and retention cysts: radiolucent, mucin-filled, painless, fluctuant swelling, bluish, appear superficially
    • Dermoid and epidermoid cysts: benign cysts, lined by keratinized squamous epithelium, contain skin appendages, located in midline of floor of mouth, slowly growing, painless, rubbery swelling
    • Thyroglossal tract cyst: develops from remnants of thyroglossal duct, located in midline of neck to base of tongue, asymptomatic, movable swelling, can cause laryngeal obstruction, varies in lining depending on location above hyoid bone
    • Complications of various cysts include dysphagia, malignant transformation, difficulty eating and speaking
    • Lecture aims to detail radiology and histopathology of uncommon cystic lesions, advised reading materials for further study.

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    Description

    Learn about the radiological and histopathological features of uncommon cystic lesions that can arise in the jaws and allied structures. Understand the classification of cysts, including non-odontogenic, odontogenic, inflammatory, and developmental cysts.

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