Nasolabial cysts are soft tissue masses located under the ala nasi that contain fluid and are lined with epithelial tissue. They most commonly occur in females and are always extraosseous. Historically, Klestadt first proposed the inclusion theory that these cysts arise from entrapped tissue within nasolabial fissures. Imaging such as CT scans can identify nasolabial cysts without displacement of upper teeth. Surgical excision via sublabial approach is the ideal treatment.

1. Nasolabial cyst Dr T Balasubramanian

3. Non odontogenic cyst

4. Epithelial inclusion cyst

5. Fissural cyst

7. Always extraosseous in its occurrence

8. Constantly located under ala nasi

9. Asymptomatic

10. No dental displacement

12. 1913 Klestadt first proposed the inclusion theory as the cause for nasolabial cyst

13. 1982 Brown Kelly described histological features of nasolabial cyst

15. Same swelling over floor of the nose

16. Asymptomatic

17. Unilateral nasal block

18. Rarely pain (infection)

20. It originates from non odontogenic epithelium

21. Lining epithelium can be pseudostratified columnar, cuboidal epithelium or stratified squamous epithelium

23. Klestadt theory: This theory proposes that these cysts arise form entrapped tissue within naso labial fissures. Hence he coined the term fissural cyst

25. Anterior cut reveals the cyst

26. Note the non displacement of upper dentition

28. Sublabial approach

29. Surgical steps Infiltration

31. Care should be taken not to rupture the cyst

32. Use of 15 blade is ideal

33. Cyst exposure

34. Cyst could rupture like this

35. Cyst excision

36. Post excision cavity

37. Wound closure with catgut

38. Thank you