Non-odontogenic Bone Lesions

Question 1

Nasopalatine Duct Cyst

(Incisive Canal Cyst)

most common

clinical

radio

Answer 1

• Most common developmental non-odontogenic cyst
• True cyst
• Clinical- may present as palatal swelling
• Radio- often has heart shapped app

Question 2

Nasolabial Cyst

location

common

tissue

Answer 2

• Smooth swelling adjacent to max lateral incisor
• Elevation of ala common
• Soft tissue involvement only, not in bone (no radio changes)

Question 3

Idiopathic Bone Cavity

AKA 2

type

Radio 2

tx

Answer 3

• Other names: simple bone cyst, traumatic bone cyst
• Psudocyst: represents an empty cavity in bone
• Do not know why it occurs (not trauma)
• Radio
  
  • Usuallly in mandibular Premolar-molar area
  • Superior margin scallops btw tooth roots
• Tx: spontaneous healing w/o tx following exploratory surgery

Question 4

Mucous Retention Pseudocyst

(Antral Pseudocyst)

symptoms

what is it

app

tx

Answer 4

• Asymptomatic
• Submucosal accumulation of mucus
• non-corticated dome shaped swelling in sinus
• No tx necessary

Question 5

Stafne Defect

(Stafne Bone Cyst)

App

symptom

occurs

radio app

Answer 5

• Salivary gland depression in mand
• Asymptomatic
• Occurs below the IAC (usually near angle of mand)
• Thickly corticated RL area

Question 6

Osteoma

what is it

radio app

assoc

other form

Answer 6

• Benign tumor of bone
• Irregularly shaped RO mass
• Multiple ones associated with Gardner syndrome
• Osteoma cutis= osteomas in skin/ buccal mucosa/muscle