Non Odontogenic Tumors Flashcards
(24 cards)
Replacement of medullary bone by cellular fibrous CT causing the bone to become fragile
Fibrous dysplasia
Types of fibrous dysplasia
Monostotic
Polyostotic
Features of monostotic
Most common
One bone affected
Occur at puberty
Maxillary lesions involving max sinus
Zygoma
Sphenoid bone
Floor of orbit
Features of polyostotic
More than one bone involved
Alkaline phosphate elevated sometimes painless
Unilateral swelling
Slow growing
Radiopaque porly defined margins
GROUND GLASS
ORANGE PEEL
FINGER PRINT appearance on xray
Fibrous dysplasia
Difference between fibrous dysplasia and hyperparathyroidism
Hyperparathyroidism - PTH levels will be high too with alkaline phosphates
Older patients
No bone involvement
Irregular shaped trabeculae of woven bone in a fibrous CT giving CHINESE CHARACTERS appearance in curved bone
Fibrous dysplasia
Polyostotic fibrous dysplasia
Skin pigmentation
Jaffe lichtenstein syndrome
Genetic disorder with severe polyostotic fibrous dysplasia
Unilateral cafe au lait spots
Endocrine abnormalities - premature puberty, hyperthyroidism, pituitary adenoma
McCune albright syndrome
Ossifying fibroma also known as
Cementifying fibroma
Cementossifying fibroma
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
Ossifying fibroma
Middle aged woman of african decent has a reactive lesion at the apex of vital mandibular anterior teeth that are asymptomatic
Periapical cemento osseous dysplasia
Periapical cementoma
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
Osteoblastoma
Autosomal dominant disorder at early puberty characterized by colorectal polyps multiple osteomas
Fibromas of skin
Epidermal cyst
Abnormalities of retina eye
Gardners syndrome
Oral findings of gardners sydrome
Multiple impacted and supernumerary teeth
Multiple jaw osteomas giving COTTON WOOL app at the angle of mandible
Multiple odontomas
Benign tumor consist of mature compact or cancellous bone
Asymptomatic
Slow growing bony hard well circumscribed radiopacity
Osteomas
Features of central giant cell granuloma
Benign lesion
young adults
Fenales
Ant to molar teeth
Asymptomatic expansile lesion
2 forms
Non aggressive
Aggressive
Multilocular radiolucency with well demarcated non corticated border
Histo: spindled fibroblasts multinicleated Giant cells in stroma of collagen
Central giant cell granuloma
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
LANGERHANS CELL DISEASE (idiopathic histiocytosis)
Three variations of langerhans cell disease
Eosinophillic granuloma - chronic localised form
Hand schuller christian syndrome - chronic disseminating form
Lettere siwe disease- acute disseminating form
Langerhan cell disease involving bone skin visceral organs
Triad of LYTIC BONE LESIONS, EXOPTHALMOS, DIABETES INSIPIDUS
Hand schuller christian syndrome
Most common form of langerhans cell disease
Eosinophillic granuloma
Multiple radiolucent lesions with SCOOPED OUT pattern causing FLOATING IN AIR app on the alveolar bone of mandible
Langerhans cell disease
Birbeck granules
Langerhans cell containing unique rod shaped cytoplasm structures in langerhans cell disease
