This document discusses several different types of cysts that can occur in the head and neck region, including nasopalatine duct cysts, oral lymphoepithelial cysts, dermoid cysts, epidermoid cysts, and globulomaxillary cysts. It provides details on the clinical and radiographic presentation of each cyst type as well as microscopic findings. The document also examines several congenital syndromes that affect craniofacial development, such as Apert syndrome, Crouzon syndrome, hemifacial hyperplasia, and mandibulofacial dysostosis.

1. Nasopalatine duct cyst. Fluctuant swelling of
the anterior hard palate.

2. Cyst of the incisive papilla. Swelling of the
incisive papilla .

4. Nasopalatine duct cyst . Well-circumscribed
radiolucency between and apical to the roots of the maxillary
central incisors.

5. Nasopalatine duct cyst . Well-circumscribed
radiolucency between and apical to the roots of the maxillary
central incisors.

6. Nasopalatine duct cyst . large destructive cyst of
the palate.

8. Nasopalatine duct cyst. Cystic lining showing
transition from pseudostratifled columnar to stratified squamous
epithelium.

9. Nasopalatine duct cyst. Flattened cuboidal epithelial lining.

10. Nasopalatine duct cyst. Cyst wall showing blood
vessels, nerve bundles, and minor salivary glands.

12. Oral lymphoepithelial cyst. Small yellowish-white
nodule of the tonsillar fossa.

13. Oral lymphoepithelial cyst. Small white nodule of
the posterior lateral border of the tongue .

15. Oral lymphoepithelial cyst. A. low-power view showing a keratin -filled cyst below
the mucosal surface. lymphoid tissue is present in the cyst wall. B. High-power view showing
lymphoid tissue adjacent to the cystic lining.

16. Cervical lymphoepithelial cyst. Fluctuant swelling
of the lateral neck.

19. Cervicallymphoepithelial cyst.Medium-powered
view showing a cyst lined by stratified squamous epithelium. Note
the lymphoid tissue in the cyst wall.

21. Thyroglossal duct cyst. Swelling (arrow) of the
anterior midline of the neck.

23. Thyroglossal duct cyst . Cyst (top) lined by
stratified squamous epithelium. Thyroid follicles can be seen in
the cyst wall (bottom).

24. Dermoid cyst. Fluctuant midline swelling in the
floor ofthe mouth.

25. Dermoid cyst. Squamous epithelia l lining (top).
with hair follicle (F) and sebaceous glands (s) in the cyst wall.

27. Epidermoid cyst . Fluctuant nodule at the lateral
edge of the eyebrow.

28. Epidermoid cyst. Infant with a mass in the
upper lip.

30. Epidermoid cyst. A. l ow-power view showing a keratin-filled cystic cavity. B,
Highpowered view showing stratified squamous epithelial lining with
orthokeratin production.

31. Globulomaxillary cyst. " Inverted pear-shaped
radiolucency (arrow) between the maxillary right cuspid and
the lateral incisor. Biopsy revealed a periapical cyst.

32. Epstein'spearl s. Small keratin -filled cysts at the
junction of the hard and soft palates.

33. Nasolabia l cyst . A. Enlargement of the left upper lip with
elevation of the ala of the
nose. B. Intraoral swelling fills the maxillary labial fold.

35. Nasolabial cyst . Pseudostratified
columnar epithelial lining.

36. Median palatal cyst. Well-circumscribed radiolucency
apical to the maxillary incisors in th e midline. At surgery
th e lesion was unrelated to the incisive canal.

37. Hemihyperplasia. Enlargement of the right side
of the face.

38. Hemihyperplasia. Same patient as depicted in. with associated enlargement of the
right half of the tongue.

39. Hemihyperplasia. Radiograph of the same patient. Mandible
and teeth on the right side are enlarged.

40. Progressive hemifacial atrophy. Young girl with
right-sided facial atrophy.

42. "cloverleaf" skull

43. Crouzon syndrome. Ocular proptosisand midface
hypoplasia.

45. Apert syndrome. Radiograph showing "tower
skull," midface hypoplasia, and digitalmarkings. Similardigital
impressions are apparent in people with Crouzon syndrome.

46. Apert syndrome. Syndactyly of the
hand.

47. Apert syndrome. Abnormal shape of the maxilla,
with swellings of the posterior lateral hard palate,
resulting in pseudocleft formation.

48. Mandibulofacial dysostosis. Patient exhibits a hypoplastic mandible,
downwardslanting palpebral fissures, and ear deformities.