Differentials

Question 1

what are 3 benign fiber-osseous lesions?

Answer 1

1. fibrous dysplasia-ground glass
2. cemento-osseous dysplasia
3. ossifying fibroma

Question 2

what are 3 benign fiber-osseous lesions?

Answer 2

1. fibrous dysplasia-ground glass
2. cemento-osseous dysplasia
3. ossifying fibroma

Question 3

Involving impacted tooth

Answer 3

1. dentigerous cyst
2. odontogenic Keratocyst
3. ameloblastoma
4. central giant cell granuloma

Question 4

Odontogenic cyst or tumor with mixed calcifications involving crown of tooth

Answer 4

1. calcifying odontogenic cyst(gorlin cyst/calcifying cystic odontogenic tumor)-incisor canine
2. adenomatoid odontogenic tumor-canine, young, snowflake
3. ameloblastic fibroma-posteror young pt
4. calcifying epithelial odontogenic tumor(pindborg)-molar driven snow

Question 5

midline radiolucency

Answer 5

1. central giant cell granuloma
2. odontogenic keratocyst
3. ameloblastoma

Question 6

bump on the gums

Answer 6

1. peripheral giant cell granuloma
2. pyogenic granuloma
3. peripherial ossifying fibroma
4. fibroma (IFH)

Question 7

3 types of ameloblastoma

Answer 7

1. peripheral-lowest recurrance, 50yo, only in soft tissue
2. conventional-20+yo angle of mandible,soap bubble highest recurrence
   3.unicystic-20yo, unerupted 3rd molars
   desmoplastic-anterior maxilla

Question 8

2 types odontoma

Answer 8

1. compound-looks like many teeth

2. complex- can’t differentiate teeth

Question 9

Gorlin syndrome consists of

Answer 9

1. basal cell carcinomas in young pt
2. calcified falx cerebri
3. bifid ribs

Question 10

ossifying fibroma differential

Answer 10

1. osteoid osteoma
2. cemento-osseous dysplasia-not true neoplasm
3. osteoblastoma-painful

ossifying fibroma is true neoplasm, root divergence,female mandible

Question 11

Involving impacted tooth

Answer 11

1. dentigerous cyst
2. odontogenic Keratocyst
3. ameloblastoma
4. central giant cell granuloma

Question 12

Odontogenic cyst or tumor with mixed calcifications involving crown of tooth

Answer 12

1. calcifying odontogenic cyst(gorlin cyst/calcifying cystic odontogenic tumor)-incisor canine
2. adenomatoid odontogenic tumor-canine, young, snowflake
3. ameloblastic fibroma-posteror young pt
4. calcifying epithelial odontogenic tumor(pindborg)-molar driven snow

Question 13

midline radiolucency

Answer 13

1. central giant cell granuloma
2. odontogenic keratocyst
3. ameloblastoma

Question 14

bump on the gums

Answer 14

1. peripheral giant cell granuloma
2. pyogenic granuloma
3. peripherial ossifying fibroma
4. fibroma (IFH)

Question 15

3 types of ameloblastoma

Answer 15

1. peripheral-lowest recurrance, only in soft tissue
2. conventional- highest recurrence
3. desmoplastic-anterior maxilla

Question 16

2 types odontoma

Answer 16

1. compound-looks like many teeth

2. complex- can’t differentiate teeth

Question 17

Gorlin syndrome consists of

Answer 17

1. basal cell carcinomas in young pt
2. calcified falx cerebri
3. bifid ribs

Question 18

ossifying fibroma differential

Answer 18

1. osteoid osteoma
2. cemento-osseous dysplasia-not true neoplasm
3. osteoblastoma-painful

ossifying fibroma is true neoplasm, root divergence,female mandible

Question 19

Radiolucent lesion differential

Answer 19

1. COC
2. AOT
3. AFO
4. CEOT