Oral Medicine

1. Where does a follicular cyst form?

1) Gingiva
2) Root
3) Crown
4) Basel cell

Answer: 3

Follicular cysts form around the crown of an unerupted, developing tooth. It is the second most common cyst. The cyst usually develops on the third molar, maxillary canine, or maxillary third molar.

2. Stevens-Johnson syndrome and TENs are variants of which disease?

1. Aphthous ulcers
2. Penphigus vulgaris
3. Erythema multiforme
4. Lichen Planus

Answer: 3

 - Stevens-Johnson syndrome and TENs are variants of erythema multiforme.
 
The origins of the lesions are from sulfa drugs, vaccinations, and viral infections. These lesions primarily present on the face and extremities. Oral lesions present as vesicles and ulcerations and spread widely throughout the oral cavity. Stevens-Johnson syndrome is considered erythema multiforme miner. If it is severe, lesions display on skin, conjunctiva, genitalia, and oral mucosa, and triggered by drugs. Treatment includes systemic corticosteroids, acyclovir, and the discontinuation of causative drugs. TENs, the most severe form of erythema multiforme, must be treated in a burn unit.

3. White sponge nevus is caused by a mutation of what gene:

1. Keratin 4 and 13
2. Keratin 5 and 12
3. Keratin 1 and 49
4. Keratin 21 and 23

Answer:1

- White sponge nevus is caused by a mutation of genes keratin 4 and keratin13. It is an autosomal dominate genetic disorder. The condition is also known as familial epithelial hyperplasia, or Cannon's disease. The mass is bilateral and rough due to epithelial thickening in the buccal mucosa. There is not treatment required.

4. Erythroplakia is:

1. Greenish plaque
2. Brown plaque
3. Red plaque
4. Yellowish plaque

Answer: 3

 - Erythroplakia is red plaque that has no clinical diagnoses and fails to resolve with several weeks with or without treatment. Biopsy is the only way to diagnose. There are three Erythroplakia conditions: median rhomboid glossitis, hereditary hemorrhagic telangiectasias, and hemangioma. Treatment is not often required beyond corticosteroid therapy to larger lesions.

5. Inflammatory papillary hyperplasia is also known as:

1. Papilloma
2. Verruca vulgaris
3. Denture papillomatosis
4. Inflammatory papillary hyperplasia

Answer: 3

 - Inflammatory papillary hyperplasia is also known as denture papillomatosis. The condition is caused by poor oral hygiene by denture wearers, poor fitting dentures, or reactive tissue growth from the wearing of dentures. Treatment options are the readjustment of dentures, removal of dentures to allow lesion-healing time, and removal of lesion by cryosurgery or curettage.