Developmental defects class period 2 TEST #1 Flashcards
What is a cyst?
-Pathologic cavity lined by epithelium
What is a pathologic cavity lined by epithelium?
-Cyst
T/F Cysts are typically fluid filled
True
Once cysts develop in the oral & maxillofacial region what occurs?
-They slowly increase in size due to the elevated hydrostatic luminal pressure
Where do Epstein pearls occur?
-Occur along the median palatal raphe
What causes epstein pearls to occur?
-Entrapped epithelium along fusion line
What palatal cysts of the newborn are scattered all over hard palate and usually near the junction of soft palate?
-Bohn’s nodules
What do Bohn’s nodules appear as?
-Small 1-3 mm of white or yellow papules near the midline
What are two types of palatal cysts of newborns?
- Epstein’s pearls
- Bohn’s nodules
What is a swelling of the upper lip, lateral to the mideline, resulting in elevation of the ala of the nose known as?
-Nasolabial cyst
Is a nasolabial cyst a cyst of the bone or the soft tissue?
-Soft tissue
Does nasallabial cysts occur in males or females more?
-Femalse
Globulomaxillary radiolucencies is a termed used by older dentist, most commonly these radiolucencies are what?
- Periapical or radicular cysts (most common)
- Periapical granuloma
What is the most common non-odontogenic cyst of the oral cavity?
-Nasopalatine duct cyst (centered around the central incisors)
Where does the nasopalatine duct cyst occur?
-Near the incisive canal
If the nasopalatine radiolucency is larger than 6 mm is it a cyst?
-Possibly
Are the teeth vital with a nasopalatine duct cyst?
-Yes If non vital then it will be a periapical cyst
What is the soft tissue counter part of a nasopalatine duct cyst?
-Cysts of the incisive papilla (appears bluish in color)
What is the most common follicular cysts of the skin?
-Epidermoid cyst
What is a dermoid cyst located around?
-Has adnexal structures in the cyst wall
What do epidermoid cysts appear as?
-White or yellow unless inflamed
Where do dermoid cysts in the oral cavity occur around on an axis?
-Midline
Where type of cysts develop from epithelial remnants of the thyroglossal tract?
-Thyroglossal duct cyst
On an axis where does a thyroglossal duct cyst form?
-Midline
What are thryoglossal cysts associated with?
-Colloid
Where do you find lymphoepithelial cysts?
- Waldeyers ring
- Lymphoid aggreagtes
Where is the most common location of lymphoepithelial cysts?
-Floor of mouth
What is the common size of a lymphoepithelial cyst?
-Mass less than 1 cm in diameter
What do lymphoepithelial cysts appear as clinically?
Yellow or white
Where do branchial cleft cysts occur?
-Occurs in upper lateral neck along anterior border of SCM
What is the branchial cleft cyst also known as?
-cervical lymphoepithelial cyst
What are lymphoepithelial cysts bilaterally on the neck associated with the parotid gland associated with?
-HIV
What is associated with asymmetric overgrowth of one or more body parts (unilateral)?
-Hemihyperplasia
What is the cause of progressive hemifacial atrophy?
-Borelia (lyme disease)
What other disease does hemifacial atrophy mimic?
-localized linear scleroderma
What is a painless unilateral enlargement of the maxillary bone along with overgrowth of overlying gingiva known as?
-Segmental odontomaxillary dysplaisa
What developmental condition has one or both of the developing maxillary premolars the are missing?
-Segmental odontomaxillary dysplasia
What is Crouzon syndrome/Craniofacial dysostosis characterized by?
-Craniosynostosis
What is the most sever case of Crouzon syndrome?
-Cloverleaf skull (Kleeblatt-schadel deformity)
What does aper syndrome have associated with it?
- Ocular proptosis (bulging eyes)
- Hypertelorism (eyes far apart)
- Syndactyly (fusion of fingers or toes)
- Lateral slant of palperal fissures
What is associated with Crouzon syndrome?
- Brachycephaly (short head)
- Ocular proptosis
- underdeveloped maxilla
Treacher collins syndrome has what associated with it?
- Defects of structures derived from 1st and 2nd branchial arches
- Hypoplastic zygoma
- coloboma (notch on outer portion of lower eyelid)
- Underdeveloped mandible
