Common differentials

Question 1

Gum Bump differential

Answer 1

• Fibroma
• Pyogenic granuloma (Lobular Capillary
Hemangioma)
• Peripheral Ossifying Fibroma
• Peripheral Giant Cell Granuloma
POF and PGCG occur ONLY on the gingiva

Question 2

Human Papilloma Virus Differential

Answer 2

• Squamous Papilloma – Types 6 and 11
• Verruca Vulgaris – Types 2, 4, 6, and 40
• Condyloma Acuminata – High risk types 16
and 18
• Heck’s Disease (Multifocal epithelial
hyperplasia) – Types 13 and 32

Question 3

Multilocular Radiolucent Differential

Answer 3

(MACHO)
• Myxoma
• Ameloblastoma
• Central Giant Cell Lesion
• Hemangioma (Vascular Malformation)
• Odontogenic Keratocyst (KCOT)
• Also may be included:
– Dentigerous cyst
– Glandular odontogenic cyst

Question 4

Mixed Radiolucent/Radiopaque

Differential Diagnosis

Answer 4

• Adenomatoid Odontogenic Tumor
• Calcifying Odontogenic Cyst
• Ameloblastic Fibro-Odontoma
• Calcifying Epithelial Odontogenic Tumor
• Ossifying Fibroma
• Fibrous Dysplasia
• Desmoplastic Ameloblastoma

Question 5

Periapical Radiopacities

Answer 5

Condensing Osteitis
• Associated with
inflammation, usually a
non-vital or irreversibly
inflamed tooth
Idiopathic Osteosclerosis
• By definition, no
discernible cause
• Any associated teeth
are vital