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30 Cards in this Set

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Focal concavity of the cortical bone on lingual surface of mandible
Lingual Mandibular Salivary Gland Depression
Age: adulthood
Gender: males
Location: posterior mandible b/t molars & angle of mandible
Lingual Mandibular Salivary Gland Depression
Radiographically: well-circumbscribed radiolucency inferior to the mandibular canal
*often sclerotic rolled border
Lingual Mandibular Salivary Gland Depression
Mimics periapical inflammatory Dx when superimposed on apicies of mandibular anterior teeth
Lingual Mandibular Salivary Gland Depression
Epstein's pearls on median palatal raphe
Palatal cysts of the Newborn
Bohn's nodules scattered over hard palate
Palatal cysts of the newborn
Clinically: 65-85% of all neonates
Clinically: 1-3 mm white/yellow pappules
Histologically: keratin filled cysts lined by stratified squamous epithelium
Palatal cysts of the newborn
Rare developmental cyst occuring in upper lip lateral to midline
Nasolabial Cyst
Caused by either
1. Fissural cyst from epithelial remnants trapped along line of fusion of maxillary, median nasal and lateral nasal process
2. Derived from misplaced epithelium of nasolacrimal duct
Nasolabial cyst
Clinically: Swelling of upper lip lateral to midline causing elevation of ala of nose
Incidence: 40-50 yo adults, females, 10% bilateral
Nasolabial cyst
Radiographic: generally abscent except for faint lucency due ot pressure resorption of underlying bone
Histology: cyst lined by pseudostratified columnar epithelium, goblet cells, & cilia
Nasolabial cyst
Developmental cyst occurring in the maxilla in between the lateral & canine teeth
Globulomaxillary Cyst
Radiographically: "pear-shaped" radiolucency between maillary lateral & canine
Globulomaxillary Cyst
Odontogenic cysts
Globulomaxillary Cyst
Developmental cyst arisign from remnants of hte nasoplatine duct, an embryologic structure connecting the oral & nasal cavities in the area of hte incisive canal
Nasopalatine duct cyst
Developmental cyst arisign from remnants of the nasopalatine duct, an embryological structure connecting the oral & nasal cavities in hte area of the incisal canal
Nasopalatine Duct Cyst
Clinical Features:
-Most common non-odontogenic cyst of oral cavity
-40-60yo, males
-Sign & Symp: long-standing & intermittent swelling of anterior palate, drainage, pain
-can also be asymptomatic
-teeth vital unless trauma/caries
Nasopalatine Duct Cyst
Radiograph:
-Round to oval to HEART-SHAPED radiolucency, sclerotic border, near midline of anterior maxilla b/t central incisors
-Root resorption seen
-Cyst confined to soft tissue
Nasopalatine Duct Cyst
Histology:
Cyst lying: Stratified squamus, pseudostratified columnar ciliated, simple columnar, simple cuboidal, or combo
-Wall of cyst contains nerves, blood vessels, occasional lobules of mucous glands, small islands of cartilage & chronic inflammation
Nasopalatine Duct Cyst
Rare fissural cyst devloped from epithelium entrapped along embronic line of fusion of lateral palatal shelves of maxilla
Median palatal cyst
Cysts represent posteriorly positioned nasopalatine duct cysts
Median palatal cyst
Young adults, M=F
-Firm swelling of midline of hard palate posterior to palatine papilla
-Radiograph: radiolucency in midlien of hard palate, divergence of roots of central incisors
Median palatal cyst
histology: cyst lined most commonly by stratified squamous epithelium, occasionally respiratory (pseudostratified columnar ciliated) epithelium
Median Palatal cyst
-Non-inflamatory cyst occuring in midline of mandible
-No epiethelium exists to be intrapped
-True cysts in this location are odontogenic
Median mandibular cyst
Developmental cyst from epithelial remnants of the embryonic thyroglossal duct (associated with descent of thyroid from pharynx floor to final neck positon)
Thyroglossal duct cyst
-1st-2nd decade of life. M=F, 50% before 20yo
-Can occur anywhere on path from foramen cecum to suprasternal notch
Thyroglossal duct cyst
-Usually painless, moveable swelling
-Lesions at base of tongue may cuase laryngeal obstruction
-If cyst attached to hyoid bone, it will more vertically during swallowing or tongue protrusion
Thyroglossal duct cyst
Fistulous tract ot skin or mucosa may develop, usually from rupture of infected cyst or following surgery
Thyroglossal duct cyst
-Cyst usually lined by columnar or stratified squamous epithelium
-Thyroid tissue may be present in wall
Thyroglossal duct cyst
-Surgical removal of cyst plus midline segment of hyoid bone & adjacent muscle
-Recurrence <10%Q
Thyroglossal duct cyst