Exophytic Lesions

Question 1

What is a hamartoma?

Answer 1

An overgrowth of mature cells and tissues normally present in the affected area, but with disorganization and often with one element predominating
-ex) a mole

Question 2

Define mesenchyme.

Answer 2

Embryonic connective tissue in the mesoderm from which are formed the various connective tissues of the body and the blood and lymphatic vessels

Question 3

What are the the common groups of soft tissue exophytic lesions?

Answer 3

• reactive
  -hamartomatous
• neoplasms
  BUT distinctions between groups is often blurred

Question 4

Describe Peripheral Ossifying Fibroma.

Answer 4

• common oral benign soft tissue lesion
• localized, smooth, solid mass, often with a shallow ulcer
• located on gingiva (generally anterior)
• calcification in cellular fibrous tissue
• AKA cementuo-ossifying fibroma

Question 5

Describe peripheral giant cell granuloma.

Answer 5

• common oral benign soft tissue lesion
• dark red or bluish, locally aggressive, vascular mall located on the gingiva anterior to molars
• causes bone resorption
• can occur on edentulous ridge
• most common in women, any age
• characterized by giant cells in a loose vascular stroma
• if intra-osseous origin, hyperparathyroidism should be ruled out

Question 6

Describe pyogenic granuloma

Answer 6

• common oral benign soft tissue lesion
• soft red vascular mass,, most common on gingiva but can occur anywhere
• rapid development
• response to low grade irritation
• characterized by granulation tissue (highly vascular connective tissue and inflammatory cells)

Question 7

Describe fibrous hyperplasia.

Answer 7

• common oral benign soft tissue lesion
• most common
• presents on all mucosal surfaces
• smooth and sessile, occasionally pedunculated
• the result of collagen deposition in response to chronic irritation

Question 8

Epulis fissuratum

Answer 8

• clinically distinct fibrous hyperplasia
• linear exophytic growth occurring adjacent to edentulous ridges in response to irritation from a poorly fitting denture

Question 9

Leaf fibroma

Answer 9

• clinically distinct fibrous hyperplasia
• flattened exophytic palatal lesion occurring under a denture surface
• resembles a leaf

Question 10

Giant Cell Fibroma

Answer 10

• distinctive variant characterized by large stellate shaped and occasionally multinucleated fibroblasts
• smooth or loublated, often confused with papilloma
• not caused by irritation
• not a granuloma