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CYSTS by Mind Map: CYSTS

1. Pseudocysts

2. Soft tissue cyst

3. Developmental

4. OKC

4.1. Arise from dental lamina

4.2. Associated with nevoid basal carcinoma in case of multiple OKC

4.3. Multilocular

4.4. Grows in anterioposterior direction without bone expansion

4.5. Budding of epithelium

4.6. High recurrence rate

5. Developmental

6. Inflammatory



9. Orthokeratinized odontogenic cyst

9.1. mandible in 2/3 of cases

9.2. Orthokeratin

10. Dentigerous cyst(follicular cyst)

10.1. Origin: accumulation of fluid between reduced enamel epithelium

10.2. Painless bony expansion

10.3. Multiple in -> Cleidocranial dysplasia and maroteaux-lamy syndrome

10.4. Mucous cells in epithelium lining

11. Eruption cyst

11.1. Young children below 10 years

11.2. Soft tissue counterpart of dentigerous cyst

11.3. Rupture spontanously , requires no treatment

12. Glandular odontogenic cyst

12.1. Aggressive behaviour

12.2. High recurrence rate

12.3. Strong predilection for anterior mandibular region

12.4. Multilocular

12.5. Histologically: varying epithelium thicknening, tufting, hobnail superficial epithelium, microcysts, clear cells, mucous cells

13. Calcifying odontogenic cyst(gorlin cyst)

13.1. Common in incisor and canine area

13.2. Radiographically: Focal radioopacity in the center surrounded by radiolucency

13.3. Histologically: Ghost cells, dysplastic dentin

14. Lateral developmental odontogenic cyst

14.1. Common in canine and premolar area

14.2. Botryoid cyst: appears polycystic grossly and microscopically, and multilocular radiographically

14.3. The pulp of the associated tooth is vital in contrast to Inflammatory lateral radicular cyst

14.4. Histologically: swirling focal epithelial thickening

15. Gingival cyst of adult

15.1. Soft tissue counterpart of lateral periodontal developmental cyst

15.2. Strong predilection for canine and premolar region

16. Gingival cyst of infants(bohn's nodule)

16.1. Common in maxillary alveolus

16.2. Keratin-filled cyst

16.3. Spontaneous regression , so no treatment needed

16.4. Cyst rarely seen after 3 months of age

17. Radicular cyst

17.1. Periapical cyst is the most common odontogenic cyst

17.2. Fluctant swelling

17.3. The tooth associated with the cyst is non-vital

17.4. Rushton hyaline bodies( Could be seen in any odontogenic cyst)

17.5. Cholesterol clefts and dystrophic calcification

18. Buccal bifurcation cyst(paradental cyst)

18.1. Develops on the buccal aspect of partially erupted molars

18.2. Occurs in children from 5 to 13 years

19. Palatal cyst of newborn(epstein pearls)

19.1. Origin: Islands of epithelium entrapped in the median palatine raphe

19.2. Located in the midline

19.3. Keratin - filled

20. Nasopalatine duct cyst

20.1. Most common intraosseous non-odontogenic cyst of the oral cavity

20.2. Located in the midline

20.3. Large cysts are characterized by fluctant swelling

20.4. May arise within the incisive papilla

20.5. Radiographically: Heart-shaped

20.6. Histologically: more than one type of epithelium may be found, The cyst wall contain nasopalatine nerve and vessels

21. Nasolabial cyst(Nasolacrimal cyst)

21.1. Rare soft tissue cyst

21.2. A strong predilection for women

21.3. Origin: epithelial remenants entrapped along the line of fusion of the maxillary , medial nasal and lateral nasal process

21.4. Occurs in the upper lip

21.5. Causes elevation of the ala of the nose

22. Dermoid cyst

22.1. Simpler in structure than teratoma

22.2. Composed of tissue from ectoderm and mesoderm only

22.3. Located in the midline of floor of the mouth

22.4. Keratin-filled

22.5. If located above the geniohyoid muscle--> Causes sublingual swelling displacing the tongue

22.6. If located below the geniohyoid muscle -->Causes submental swelling and double chin appearance

22.7. Contains dermal appendages in the cyst wall

23. Intraoral epidermoid cyst

23.1. Represent the simplest expression of teratoma

23.2. Composed of tissues from the ectoderm only

23.3. Doesn't contain dermal appendages

24. Lymphoepithelial cyst

24.1. Arises from the second branchial arch

24.2. Fluctuant swelling

24.3. Located on the lateral aspect of the neck

24.4. Histologically: the cyst wall contains lymphoid tissue and may demonstrate germinal centers

25. Thyroglossal duct cyst

25.1. Arise from remanants of the thyroglossal duct cyst

25.2. Located in the midline

25.3. Fluctuant and movable swelling

25.4. If attached to hyoid bone or tongue --> it moves vertically during swallowing

25.5. Histologically: the epithelial lining varies by site, Thyroid tissue may be present in the cyst wall

26. Traumatic bone cyst(Solitary bone cyst)

26.1. It is an empty cyst

26.2. Marked mandibular predominance

26.3. Radiographically: appear scalloping between the roots of adjacent teeth

26.4. Treatment by curretage

27. Aneurysmal bone cyst

27.1. Blood soaked sponge appearance clincally

27.2. More common in the posterior region of the mandible

27.3. Rapidly enlarging swelling associated with pain or parathesia

27.4. Multilocular raidographically

27.5. Histologically; blood filled spaces not lined by endothelium, Numerous giant cells in the cyst wall

28. Stafne bone cyst

28.1. Its is a developmental anomaly

28.2. Located under the inferior alveolar canal

28.3. Due to extension of the salivary gland