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30 Cards in this Set
- Front
- Back
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Focal concavity of the cortical bone on lingual surface of mandible
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Lingual Mandibular Salivary Gland Depression
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Age: adulthood
Gender: males Location: posterior mandible b/t molars & angle of mandible |
Lingual Mandibular Salivary Gland Depression
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Radiographically: well-circumbscribed radiolucency inferior to the mandibular canal
*often sclerotic rolled border |
Lingual Mandibular Salivary Gland Depression
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Mimics periapical inflammatory Dx when superimposed on apicies of mandibular anterior teeth
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Lingual Mandibular Salivary Gland Depression
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Epstein's pearls on median palatal raphe
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Palatal cysts of the Newborn
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Bohn's nodules scattered over hard palate
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Palatal cysts of the newborn
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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
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Rare developmental cyst occuring in upper lip lateral to midline
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Nasolabial Cyst
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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
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Clinically: Swelling of upper lip lateral to midline causing elevation of ala of nose
Incidence: 40-50 yo adults, females, 10% bilateral |
Nasolabial cyst
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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
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Developmental cyst occurring in the maxilla in between the lateral & canine teeth
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Globulomaxillary Cyst
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Radiographically: "pear-shaped" radiolucency between maillary lateral & canine
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Globulomaxillary Cyst
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Odontogenic cysts
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Globulomaxillary Cyst
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Developmental cyst arisign from remnants of hte nasoplatine duct, an embryologic structure connecting the oral & nasal cavities in the area of hte incisive canal
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Nasopalatine duct cyst
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Developmental cyst arisign from remnants of the nasopalatine duct, an embryological structure connecting the oral & nasal cavities in hte area of the incisal canal
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Nasopalatine Duct Cyst
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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
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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
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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
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Rare fissural cyst devloped from epithelium entrapped along embronic line of fusion of lateral palatal shelves of maxilla
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Median palatal cyst
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Cysts represent posteriorly positioned nasopalatine duct cysts
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Median palatal cyst
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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
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histology: cyst lined most commonly by stratified squamous epithelium, occasionally respiratory (pseudostratified columnar ciliated) epithelium
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Median Palatal cyst
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-Non-inflamatory cyst occuring in midline of mandible
-No epiethelium exists to be intrapped -True cysts in this location are odontogenic |
Median mandibular cyst
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Developmental cyst from epithelial remnants of the embryonic thyroglossal duct (associated with descent of thyroid from pharynx floor to final neck positon)
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Thyroglossal duct cyst
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-1st-2nd decade of life. M=F, 50% before 20yo
-Can occur anywhere on path from foramen cecum to suprasternal notch |
Thyroglossal duct cyst
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-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
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Fistulous tract ot skin or mucosa may develop, usually from rupture of infected cyst or following surgery
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Thyroglossal duct cyst
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-Cyst usually lined by columnar or stratified squamous epithelium
-Thyroid tissue may be present in wall |
Thyroglossal duct cyst
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-Surgical removal of cyst plus midline segment of hyoid bone & adjacent muscle
-Recurrence <10%Q |
Thyroglossal duct cyst
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