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Non odontogenic cyst
1.
2.
3. Fissural cysts of oral origin
Nasopalatine duct cyst
Median palatal cyst
Globulomaxillary cyst
Median mandibular cyst
Nasolabial cyst
Palatal and alveolar cyst of new born (Epstein’s pearls and Bohn’s nodules)
Thyroglossal cyst
Epidermal inclusion cyst
Dermoid cyst
Heterotopic oral gastrointestinal cyst
Lymphoepithelial cyst
4. Most common non odontogenic cyst
Midline anterior maxilla
Persistence of epithelial remnants
Stimulus – trauma, infections
Clinical features
Males, wide age range
Small cyst- asymptomatic
Large cyst- fluctuant swelling, discharge & pain
Salty taste in mouth, devitalization of pulp
Tooth displacement
Extra bony cyst- soft tissue of incisive papilla- bluish colour dome shaped swelling
6. Line of fusion of palatal processes of maxilla
Mid line of hard palate between lateral palatal
processes
Swelling – asymptomatic
Radiographic- well circumscribed radiolucent area
bordered by sclerotic bone
H/P- stratified squamous epithelium, dense fibrous
connective tissue, chronic inflammatory cell
infiltration.
Pseudostratified ciliated columnar epithelium –
occasionally
Treatment – surgical removal + curettage
7. Between maxillary lateral incisor and canine
Epithelial entrapment between medial nasal
process and maxillary process
Bone suture between premaxilla and maxilla
Often asymptomatic, pain – if infected
Incidental finding in radiograph
Inverted pear shape radiolucency between lateral
incisor and cuspid causing divergence of roots
9. Rare swelling in the mucolabial fold and in the floor of
the nose
not visible on radiograph
h/p – pseudostratified columnar epithelium, sometimes
with stratified squamous epithelium
Treatment – careful surgical excision to prevent
perforation of the floor of the nose
10. Extremely rare
Midline of mandible
Epithelial remnants entrapped in the median
mandibular fissure
Asymptomatic expansion of cortical plates
Incidental radiographic finding
Unilocular / multilocular, well circumscribed
radiolucency
h/p – thin, stratified squamous epithelium with many
folds
Treatment – surgical excision with preservation of
teeth
11. Epstein’s pearls Bohn’s nodules
Entrapment of epithelial remnants From Palatal glandular structures
13. Rare, benign, midline neck mass
Dilation of a remnant at the site where the primitive thyroid
descended from its origin at the base of the tongue to the neck
Palpable, asymptomatic, moves with swallowing
h/p – stratified squamous epithelium, ciliated columnar
epithelium, connective tissue wall containing patches of
lymphoid tissue, thyroid tissue and mucous glands
Treatment – antibiotics, if infected,
surgical excision of cyst, path’s tract and
branches
14. Implantation of epidermal elements
Source is often the infundibulum of hair follicle
Asymptomatic, slow growth
3rd to 4th decade of life
Foul smelling , cheesy discharge
Firm, round, mobile, subcutaneous nodules
In oral location, it causes difficulty in feeding, swallowing
and phonation
h/p – stratified squamous epithelium with glandular
differentiation, filled with keratin
Calcifications in connective tissue, malignant
transformation of epithelium is common
Treatment – surgical removal
Prognosis – malignant transformation: poor prognosis
15. Hamartomatous tumor, multiple sebaceous
glands, skin adnexa (nails, dental, cartilage,
bone)
Occurs on skin of face, neck, scalp
Intra cranial, intra abdominal, ovary,
3 sub classes : epidermoid cyst, dermoid
cyst & teratoid cyst
h/p – lined by epidermis possessing
epidermal appendages, hair projecting in
lumen, sebaceous glands
Treatment – surgical excision
16. Esophagus, small intestine, thoracic cyst,
pancreas, gall bladder
Oral cysts lined by gastric or intestinal
mucosa
Tongue, floor of the mouth
Any age, males
Asymptomatic small nodule
h/p – lined by stratified squamous epithelium as well
as gastric mucosa
Treatment – surgical excision
17. Benign lymphoid aggregate
Cervical – branchial cleft cyst
Entrapped duct epithelium in the lymph nodes
Movable painless sub mucosal nodule, 0.6cm in
diameter
Intra orally floor of the mouth, tongue, soft
palate, tonsils
Ruptured to release foul tasting cheesy
keratinaceous material
Clinically mimic dermoid or epidermoid cyst
h/p – atrophic stratified squamous epithelium, no
rete ridges, minimal granular layer, goblet cells
Treatment – surgical excision, no malignant
potential.