Non-Odontogenic RL

Question 1

RL Non-Odontogenic Lesions

Cysts 3

Pseudocysts 2

Other 3

Answer 1

• Cysts
  
  • Nasolabial cyst
  • Nasopalatine Canal Cyst
  • Idiopathic Bone Cavity
• Pseudocysts
  
  • Idiopathic Bone Cavity
  • Stafne Bone Cyst
• Other
  
  • Central Giant Cell Granuloma
  • Hermangioma/Vascular Malformation
  • Osteoporotic Bone Marrow Defect

Question 2

Nasolabial Cyst

Develops from

Common in

Apperance 2

Tx

Answer 2

• Develops from remnants of nasolacrimal ducts
• More common in Females
• Elevation of ala of the nose
• Swelling of upper lip lateral to midline
• Tx
  
  • Surgical excision

Question 3

Nasopalatine Duct Cyst

Arises from

Connects

Symptoms

Xray

Tx

Answer 3

• Most common of non-odontogenic cysts
• Arises from remnants of nasopalatine duct
• Connects oral and nasal cavities in the incisive canal area
• Swelling of anterior plate, with drainage and pain
• Xray
  
  • RL, well circumscribed, tound/oval, Heart shape
  • In midline of ant max
• Tx
  
  • Excision
  • Biopsy required

Question 4

Globulomaxillary Cyst

Answer 4

• Fusion of globular and max process
• This cyst does not exist

Question 5

Median Mandibular Cyst

Answer 5

Dose not exist

Question 6

Idiopathic Bone Cavity

What is it

Demographic

Location

xray

tx

Answer 6

• Benign, empty or fluid containing cavity within bone
• Children 10-20 yo
• Most in Posterior mand
• Lack epithelial lining, not a cyst
• Xray
  
  • Well defined RL
  • Corticated superior border
  • Non-corticated inferior border
  • Scallops in between roots
• Tx
  
  • Open and remove blood, will fill with bone afterwards

Question 7

Stafne Bone Cyst

What is it

Demo

Xray

Tx

Answer 7

• Focal concavity of bone on lingual surface of mand assoc with submandibular gland
• Common in men
• Xray
  
  • RL below mand canal, btw molar and angle
  • Usually thick corticated border
• No Tx

Question 8

Central Giant Cell Granuloma

Demo

Common found

growth

Xray

Tx for nonagg and aggressive

Answer 8

• Common in young children, young adults, females but can occur in all ages
• Common in ant Mand but can also be in Max
• All are benign but aggressive with rapid growth
• Xray
  
  • RL with well defined borders
  • may or may not have a corticated border
  • Uniocular or multiocular
  • Can cause expansion and or perforation of cortical plate
  • Tends to resorb roots horizontally
• Tx
  
  • Curettage
  • Aggressive-intralesional coticosteroids, calcitonin, interferon

Question 9

Aggressive vs Non-aggressive Central Giant Cell Granuloma

Answer 9

• Most are non-aggressive
  
  • Asymptomatic, slowly growing, no root resorption, no perforation of cortical bone
• Aggressive
  
  • Pain and paresthesia, root resorption, cortical perforation and higher recurrence

Question 10

Vascular Lesions of Bone: Hemangioma and Vascular Malformation

What are both

Both detected during

Xray app

Tx

Answer 10

• Hemangioma
  
  • Benign Proliferation of small blood vessels
• Vascular Malformation
  
  • Proliferation of small vessels and larger arterial vessels assoc with more blood flow
  • Excessive bleeding during surgery
  • Part of Sturge-Weber Syndrome
  • May have thrill or bruit (hard)
• Both
  
  • Detected during first 3 decades of life
• Xray
  
  • RL well defined, corticated borders
  • May have RO areas, honeycombed or soap bubble
  • May have coarse internal trabeculae
• Tx
  
  • Aspiration before biopsy or extraction to rule out VM
  • Angiography and surgical resection
  • Thromboembolization of VM

Question 11

Focal Osteoporotic Bone Marrow Defect

What is it

May be confused with

Key to ID

Common in / location

Answer 11

• Area of hematopoietic marrow that produces RL
• May be confused with intraosseous neoplasm
• Variation of normal, may look pathosis
• Key to differentiate
  
  • Shape is irregular
  • Trabecular pattern still seen inside lesion
• Common in wome, post mand
• No jaw expansion