This presentation will give you an intense knowledge about the non odontogenic cysts explained with crisp texts, beautiful diagrams and pictures.

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

5. Treatment : enucleation

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

8. Treatment
Surgical removal with
preservation of teeth

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

12. h/p – thin stratified squamous epithelium, connective tissue stroma,
Lumen- filled with keratin (onion rings)
Treatment – no treatment required

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
 h/p – atrophic stratified squamous epithelium, no
rete ridges, minimal granular layer, goblet cells
 Treatment – surgical excision, no malignant
potential.