Non Odontogenic Tumors

Question 1

Replacement of medullary bone by cellular fibrous CT causing the bone to become fragile

Answer 1

Fibrous dysplasia

Question 2

Types of fibrous dysplasia

Answer 2

Monostotic
Polyostotic

Question 3

Features of monostotic

Answer 3

Most common
One bone affected
Occur at puberty
Maxillary lesions involving max sinus
Zygoma
Sphenoid bone
Floor of orbit

Question 4

Features of polyostotic

Answer 4

More than one bone involved
Alkaline phosphate elevated sometimes painless
Unilateral swelling
Slow growing

Question 5

Radiopaque porly defined margins
GROUND GLASS
ORANGE PEEL
FINGER PRINT appearance on xray

Answer 5

Fibrous dysplasia

Question 6

Difference between fibrous dysplasia and hyperparathyroidism

Answer 6

Hyperparathyroidism - PTH levels will be high too with alkaline phosphates
Older patients
No bone involvement

Question 7

Irregular shaped trabeculae of woven bone in a fibrous CT giving CHINESE CHARACTERS appearance in curved bone

Answer 7

Fibrous dysplasia

Question 8

Polyostotic fibrous dysplasia
Skin pigmentation

Answer 8

Jaffe lichtenstein syndrome

Question 9

Genetic disorder with severe polyostotic fibrous dysplasia
Unilateral cafe au lait spots
Endocrine abnormalities - premature puberty, hyperthyroidism, pituitary adenoma

Answer 9

McCune albright syndrome

Question 10

Ossifying fibroma also known as

Answer 10

Cementifying fibroma
Cementossifying fibroma

Question 11

Benign fibroosseus lesion mainly mandibular molar premolar area arises from tooth bearing areas - undifferentiated cells from PDL, well defined circumscribed involving one bone at a time

Answer 11

Ossifying fibroma

Question 12

Middle aged woman of african decent has a reactive lesion at the apex of vital mandibular anterior teeth that are asymptomatic

Answer 12

Periapical cemento osseous dysplasia
Periapical cementoma

Question 13

30 yr male benign tumir of the bones arising from osteoblasts with dull pain tenderness swelling on post mandible has well or ill defined round to oval radiolucency

Answer 13

Osteoblastoma

Question 14

Autosomal dominant disorder at early puberty characterized by colorectal polyps multiple osteomas
Fibromas of skin
Epidermal cyst
Abnormalities of retina eye

Answer 14

Gardners syndrome

Question 15

Oral findings of gardners sydrome

Answer 15

Multiple impacted and supernumerary teeth
Multiple jaw osteomas giving COTTON WOOL app at the angle of mandible
Multiple odontomas

Question 16

Benign tumor consist of mature compact or cancellous bone
Asymptomatic
Slow growing bony hard well circumscribed radiopacity

Answer 16

Osteomas

Question 17

Features of central giant cell granuloma

Answer 17

Benign lesion
young adults
Fenales
Ant to molar teeth
Asymptomatic expansile lesion
2 forms
Non aggressive
Aggressive

Question 18

Multilocular radiolucency with well demarcated non corticated border
Histo: spindled fibroblasts multinicleated Giant cells in stroma of collagen

Answer 18

Central giant cell granuloma

Question 19

Clonal proliferations os cell exhibiting phenotypic characteristics of langherhans cells in children under 15yrs or young adults affecting any bone. Giving teeth FLOATING IN SPACE look on xray followed by pain tenderness and swelling in mandible

Answer 19

LANGERHANS CELL DISEASE (idiopathic histiocytosis)

Question 20

Three variations of langerhans cell disease

Answer 20

Eosinophillic granuloma - chronic localised form
Hand schuller christian syndrome - chronic disseminating form
Lettere siwe disease- acute disseminating form

Question 21

Langerhan cell disease involving bone skin visceral organs
Triad of LYTIC BONE LESIONS, EXOPTHALMOS, DIABETES INSIPIDUS

Answer 21

Hand schuller christian syndrome

Question 22

Most common form of langerhans cell disease

Answer 22

Eosinophillic granuloma

Question 23

Multiple radiolucent lesions with SCOOPED OUT pattern causing FLOATING IN AIR app on the alveolar bone of mandible

Answer 23

Langerhans cell disease

Question 24

Birbeck granules

Answer 24

Langerhans cell containing unique rod shaped cytoplasm structures in langerhans cell disease