Oral epithelial tumor

1. Papilloma, floor of mouth.

2. Papilloma, lateral tongue.

3. Papilloma

4. Oral wart, palate.

8. Oral wart.

9. wart

10. Oral wart.

11. Oral wart. Immunohistochemical stain for common human
papillomavirus in an oral wart. Positive, brown-staining nuclei
are seen in upper level keratinocytes.

12. Condyloma acuminatum.

13. Focal epithelial hyperplasia of the lip.

14. Focal epithelial hyperplasia of the
buccal mucosa.

15. Biopsy specimen showing carcinoma in
situ.

16. in situ carcinoma extending into
salivary duct.

17. Squamous cell carcinoma. Small, crusted ulcer
of the lower lip vermilion.

18. Squamous cell carcinoma. Ulcerated mass of
the lower lip vermilion.

19. Squamous cell carcinoma of the
gingiva.

20. Squamous cell carcinoma, floor of
mouth.

21. Advanced squamous cell carcinoma of
the posterior-lateral tongue.

22. Squamous cell carcinoma, gingiva.

23. Squamous cell carcinoma of the lip.

24. Exophytic squamous cell carcinoma of
the lip.

25. Squamous cell carcinoma of the lateral
tongue in a 34-year-old man.

26. Squamous cell carcinoma of the lateral
tongue.

27. Squamous cell carcinoma of the
ventral surface of the tongue.

28. Early squamous cell carcinoma of the
floor of mouth.

29. Early squamous cell carcinoma of the
floor of mouth.

30. Squamous cell carcinoma of the floor
of mouth.

31. Squamous cell carcinoma of the floor
of mouth.

32. Second primary squamous cell carcinoma of the
palate in a 34-year-old man.

33. Metastasis of squamous cell carcinoma of the
tongue to a submandibular lymph node.

34. Squamous ce ll carcinoma. Metastatic deposits
within cervical lymph nodes present as firm, painless enlargements
as seen in this patient with metastasis to a superior jugular node
froma posterior lateral tongue carcinoma.

35. Well-differentiated squamous cell carcinoma.
l ow-power photomicrograph showing islands of malignant squamous
epithelium invading into the lamina properia.

37. Well-differentiated squamous cell carcinoma.
High-power view showing dysplastic epithelial cells with keratin
pearl formation.

40. Moderately differentiated squamous cell carcinoma.
Although no keratinization is seen in this medium-power
view, these malignant cells are still easily recognizable as being of
squamous epithelial origin.

43. Poorly differentiated squamous cell carcinoma.
The numerous pleomorphic cells within the lamina properia
represent anaplastic carcinoma.

48. Verru cous carcinoma. Extensive papillary, white
lesion of the maxillary vestibule.

49. Verrucous carcinoma. Large, exophytic,
papillary mass of the maxillary alveolar ridge.

50. Verrucous carcinoma. Low-power photomicrograph
showing marked epithelial hyperplasia with a rough, papillary
surface and keratin plugging.

51. Verrucouscarcinoma. High-power view showing
bulbous rete ridges without significant dysplasia.

53. Erythroleukoplakia. Mixed red-an d-white lesion
of the lateral borde r of the tongue. Biopsy revealed carcinoma
in situ.

54. l eu koplakia. Extensive ventra l and lateral tongue
lesion containing multiple areas representi ng various possible
pha ses or clinical appearances

55. Moderate epithelial dysplasia. Dysplast ic
changes extend to the midpo int of the ep ithelium and are character
ized by nuclear hyperchromatism. pleomorphism, and ce llular
crowding.

58. Ductal dysplasia. Salivary gland duct exhibiting
squamous metaplasia and dysplasia t hat originated from an overlying
surface epit helial dysplasia

59. Basal cell carcinoma.

60. Basal cell carcinoma. Noduloulcerat ive lesion of
the upper lip demonstrating telangiectasia and small
ulceration.

61. Basal cell carcinoma.

62. Basal cell carcinoma. Pigmented basal cell carcinoma
of the cheek.

63. Basal cell carcinoma.

64. Basal cell carcinoma. Note solid
tumor (left) and nested tumor (right).

65. Basal cell carcinom a. low- power photomicrograph
showing ulceration of the epidermal surface associated with
an invading tumor of hyperchromatic epithelial cells. Inset demonstratesislands
of basophilic epithelium with peripheral palisading.