Oral and Maxillofacial Pathology: Cysts and Cyst-Like Lesions
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Questions and Answers

What is the definition of odontogenic cysts?

  • Cysts arising from embryonic vestiges or tracts
  • Cysts containing fluid or semi-fluid material
  • Inflammatory cysts occurring in the periodontium of the tooth (correct)
  • Non-inflammatory cysts occurring in the periodontium of the tooth

Which type of cyst is characterized by epithelial proliferation resulting in necrosis of central cells?

  • Residual Cyst (correct)
  • Gingival Cyst of Adult
  • Primordial Cyst
  • Orthokeratinized Odontogenic Cyst

What is a potential consequence of odontogenic cysts?

  • Osteomyelitis (correct)
  • Disfigurement of face
  • Reduced intracystic pressure
  • Enhanced eruption of teeth

Which type of cyst may prevent the eruption of teeth?

<p>Dentigerous Cyst (C)</p> Signup and view all the answers

What is a characteristic feature of non-odontogenic cysts?

<p>Neoplasms arising from the epithelial lining (B)</p> Signup and view all the answers

Which type of cyst is an example of an odontogenic keratocyst?

<p>Orthokeratinized Odontogenic Cyst (A)</p> Signup and view all the answers

Which type of cyst is categorized as a non-odontogenic cyst?

<p>Median Palatal Cyst (D)</p> Signup and view all the answers

What is a common feature of cyst-like lesions?

<p>'Serres pearl' and 'RDE' are associated with their formation (B)</p> Signup and view all the answers

Which type of cyst is an example of a non-odontogenic fissural cyst?

<p>'Median Alveolar Cyst' (A)</p> Signup and view all the answers

'Aneurysmal Bone Cyst' is an example of which category?

<p>Non-Odontogenic Cysts. (C)</p> Signup and view all the answers

Which odontogenic cyst is the most common in the oral cavity?

<p>Apical cyst (C)</p> Signup and view all the answers

What is the histogenesis of the apical cyst?

<p>Ep. rests of Malassez within a granuloma (A)</p> Signup and view all the answers

What is a key clinical feature associated with the apical cyst?

<p>Always associated with a non-vital tooth (A)</p> Signup and view all the answers

What is the characteristic radiographic appearance of the apical cyst?

<p>Well-defined radiolucent area surrounded by radiopaque margin (A)</p> Signup and view all the answers

What is commonly found in the connective tissue wall of the apical cyst?

<p>Russell bodies (eosinophilic masses representing ageing plasma cells) (C)</p> Signup and view all the answers

What type of epithelial lining is commonly seen in the apical cyst?

<p>Hyperplastic non-keratinized stratified squamous epithelium (A)</p> Signup and view all the answers

What is the characteristic fluid found in the cystic cavity of an apical cyst?

<p>Yellowish, transparent fluid (sterile unless infected) (C)</p> Signup and view all the answers

What clinical manifestation may occur if an apical cyst enlarges and presses on the inferior alveolar nerve?

<p>Numbness of the lower lip (A)</p> Signup and view all the answers

What does aspiration biopsy reveal in differentiating between cysts and tumors?

<p>Presence of a fluid (A)</p> Signup and view all the answers

How might an infected apical cyst behave?

<p>As an abscess (C)</p> Signup and view all the answers

Study Notes

Odontogenic Cysts

  • Definition: Odontogenic cysts are cysts that originate from odontogenic tissues, including enamel, dentin, and pulp.
  • Characteristic feature: Epithelial-lined cavities that can arise from various parts of the tooth-forming apparatus.

Types of Cysts

  • Odontogenic keratocyst: Characterized by epithelial proliferation resulting in necrosis of central cells.
  • Non-odontogenic cyst: Characterized by the absence of odontogenic epithelium.
  • Fissural cyst: A type of non-odontogenic cyst that may prevent the eruption of teeth.

Apical Cyst

  • Definition: A type of odontogenic cyst that arises from the apical region of a tooth.
  • Histogenesis: Derived from the epithelial rests of Malassez.
  • Clinical feature: Often asymptomatic, but can cause pain and swelling.
  • Radiographic appearance: Radiolucent lesion at the apex of a tooth.
  • Connective tissue wall: May contain inflammatory cells and blood vessels.
  • Epithelial lining: Typically simple cuboidal or flat.
  • Cystic cavity fluid: Straw-colored fluid with protein and inflammatory cells.
  • Clinical manifestation: Compression of the inferior alveolar nerve can cause numbness or paresthesia of the lip and chin.
  • Aspiration biopsy: Reveals the nature of the lesion, helping to differentiate between cysts and tumors.

Infected Apical Cyst

  • Behavior: May behave like an abscess, with pain, swelling, and pus.

Miscellaneous

  • Aneurysmal Bone Cyst is an example of a non-odontogenic cyst.
  • Odontogenic cysts can have a significant impact on dental health and may require surgical intervention.
  • Cyst-like lesions often have a characteristic fluid-filled cavity.

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Test your knowledge on cysts and cyst-like lesions in the context of oral and maxillofacial pathology. Explore pathological cavities, epithelial proliferation, and intracystic pressure in this quiz.

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