Fibro-osseous Lesions

Question 1

Osseous Dysplasia

Answer 1

Idiopathic, 4th to 5th decade
Mandible
Focal, periapical, florid
Teeth vital - no treatment necessary

Question 2

Osseous Dysplasia Radio Features

Answer 2

Radiolucent then mixed density then radiopaque

Corticated granular with light radiolucent rim

Question 3

Ossifying Fibroma

Answer 3

Benign neoplasm
20-30s in females, mandible
Lots of swelling, encapsulated

Question 4

Juvenile Ossifying Fibroma

Answer 4

More aggressive
1st to 2nd decade

Psammomatoid -> maxilla
Trabecular -> paranasal sinus regions
Recurrence = 30-58%

Question 5

Juvenile Ossifying Fibroma Radio Features

Answer 5

Large, expansile
Teeth displacement
Radiolucent border

Question 6

Fibrous dysplasia

Answer 6

Monostotic - maxillary, unilateral
Polystotic - maxilla/mandible, unilateral/bilateral
Usually ceases with developmental growth
Hypercementosis/lack of lamina dura

Question 7

Central Giant Cell Granuloma

Answer 7

Young people, femalse 2:1
Mandible
Expansion
Well defined and multilocula. Whispy cepta, 90 degree straight septa

Question 8

Cherubism

Answer 8

Almost always bilateral enlargement of bones, maxilla and mandible

Well define cortical multilocular whispy septa

Question 9

Osteitis Deformans (Pagets)

Answer 9

Osteoclastic driven bone resporption followed by osteoblastic driven apposition = poor bone quality

Mature bone = straited and irregular hypercementosis

Question 10

Aneurysmal Bone Cyst

Answer 10

Large vascular portion
Mixed density lesion but mostly radiolucent
Mandible

Question 11

Langerhans Cell Histiocytosis

Answer 11

Aggressive idiopathic characterized by abnormal proliferation of immune cells (like langerhans)
Punched out radiolucency non-corticated
Can have periosteal parallel rxns