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?

Dentigerous Cyst Signup and view all the answers

What is a characteristic feature of non-odontogenic cysts?

Neoplasms arising from the epithelial lining Signup and view all the answers

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

Orthokeratinized Odontogenic Cyst Signup and view all the answers

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

Median Palatal Cyst Signup and view all the answers

What is a common feature of cyst-like lesions?

'Serres pearl' and 'RDE' are associated with their formation Signup and view all the answers

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

'Median Alveolar Cyst' Signup and view all the answers

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

Non-Odontogenic Cysts. Signup and view all the answers

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

Apical cyst Signup and view all the answers

What is the histogenesis of the apical cyst?

Ep. rests of Malassez within a granuloma Signup and view all the answers

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

Always associated with a non-vital tooth Signup and view all the answers

What is the characteristic radiographic appearance of the apical cyst?

Well-defined radiolucent area surrounded by radiopaque margin Signup and view all the answers

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

Russell bodies (eosinophilic masses representing ageing plasma cells) Signup and view all the answers

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

Hyperplastic non-keratinized stratified squamous epithelium Signup and view all the answers

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

Yellowish, transparent fluid (sterile unless infected) Signup and view all the answers

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

Numbness of the lower lip Signup and view all the answers

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

Presence of a fluid Signup and view all the answers

How might an infected apical cyst behave?

As an abscess 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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Description

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.