Cysts1 Flashcards
What are some of Radicular Cysts?
الانتشار
منشأة
أسبابه النظريات
اسماء اخري
Most common cyst of the jaw.
Epthielial rests of Malessez
1- Nutritional Deficiency theory
3-Merging of Epithelial Strand theory
3-Abscess theory
Apical Cyst. Periapical Cyst)
What are some of Radicular Cysts?
العمر
اماكن
Age :3 to 6 decades .
- Maxilla more than mandible
in the following orders:
Maxillary anterior ,
Maxillary posterior ,
Mandibular posterior , then anterio
What are the radiographic features of Radicular Cysts?
الجام
Well defined
radiolucency
with
radio opaque
The adjacent teeth can be
displaced but rarely
resorbed
What are the histopathologic features of the epithelial lining of a Radicular Cyst
Non keratinized stratified squamous
epithelium
Cholesterol clefts be present.
Multinucleated foreign-body giant cells may be seen
Lipid filled macrophages (foam cells
Rushton bodies(hyaline,eosinophil)
What is a Paradental Cyst?lateral
Develops on the lateral surface of a tooth root. It results from inflammation of the gingiva over an erupting molar and is associated with partially impacted 3rd
What is a Buccal Bifurcation cyst?
An uncommon cyst that develops on the buccal aspect over the furcation mandibular first permanent molar. It originates from a buccal pocket or tooth with ectopic enamel.
Children
What is the origin of a Dentigerous Cyst?
الانتشار
منشأه
It is the second most common odontogenic cyst .
- Most common developmental cyst.
proliferation
of the reduced enamel epithelium.
separation of the follicle from
around the crown of an unerupted tooth
What is the origin of a Dentigerous Cyst?
العمر
الجنس ، اللون
المكان
الاعراض
2،3 decades.
whites than for blacks.
Upper canine lower8
Large cyst and small cyst
What is the origin of a Dentigerous Cyst?
Exry
Well defined unilocular radiolucent area that is associated
with crown of an unerupted tooth.
• If infected, the border may be ill defined.
• A large cyst ((multilocular radiolucency ))
ongstanding cysts teeth))
((resorption of adjacent erupted
What are the histopathologic features of the epithelial lining of a Dentigerous Cyst?
non keratinized stratified squamous
cholesterol crystals are common.
Small islands or cords of inactive تتحول
odontogenic tumors.
للأورام م ameloblastoma م
odontogenic epithelial rests
may be present connective tissue wall.
mucous cells and Rarely, ciliated columnar cells
are present.
What happens to the histopathologic features of a Dentigerous Cyst in cases of inflammation
ومضاعفاته
Epithelial hyperplasia
• Developments of rete ridges
ameloblastoma.
mucoepidermoid carcinoma
a squamous cell carcinoma
What is an Eruption Cyst?
soft tissue analogue of the dentigerous cyst that occurs within the gingiva
eruption hematomas)في ال
Eruption Cyst اي هي ؟
Surface trauma results in bleeding in the cystic fluid
giving it a purplish
Eruption Cyst
عمر
مكان
Most of cases are seen in children younger
than 10 years.
erupting tooth, the lesion is most commonly
associated with the first permanent molars and the
maxillary incisors.
Eruption Cyst Histologic features:
• Lamina propria shows a
variable inflammatory cell
infiltrate because of exposure
to trauma.
• A deep portion formed of a thin
non keratinizing squamous
epithelial lining
What is an Odontogenic Keratocyst (OKC)
بيتكون من اي
العمر
المكان
cell rests of the dental lamina
old age (10-40 years old ).
Mandible > maxilla . Body of the mandible, posterior
region and ascending ramu
What are the signs and symptoms of an Odontogenic Keratocyst
الامتداد
الخاصيه هل هو لوحده ام معاه حاجه تانيه
antero-
posterior direction and can
reach large sizes without causing obvious bony
The majority of keratocysts present as a solitary cysts.
Multiple cysts are associated with the Nevoid basal cell
carcinoma syndrome (Gorlin Goltz syndrome
What are the histopathological features of an Odontogenic Keratocyst
ولو التهب
parakeratinized
epithelial lining
clear liquid or cheesy
material
(keratinous debris)
Small satellite cysts, cords, or islands of odontogenic
epithelium
f the cyst become infected, inflammatory changes take
place as:
- Para → ortho-keratinization
- Epithelial proliferation &Rete processes develop.
What are the complications of an Odontogenic Keratocyst?
معدل الرجوع
Ameloblastic transformation
Recurrence – high rate of recurrence.
What is a Calcifying Odontogenic Cyst (COC), also known as Gorlin Cyst?
مكانه
الأورام المرتبطة بيه
majority of lesions are central COC (within bone of jaw,
intraosseous). Less commonly, peripheral lesions may be
seen (located on gingival tissues,
anterior regions of jaws, incisor /
commonly odontoma
What are the clinical features of Calcifying Odontogenic Cysts
Ex ray
unilocular or multilocular
radiolucent area containing varying
number of radiopaque structures
within the lesion, either irregular
calcifications or tooth like densities.
without root resorption
