Non-trauma CF skeletal defects

Question 1

List ODONTOGENIC MANDIBLE tumours

Answer 1

Benign:

• Epithelial
  • Ameloblastoma
• Mixed
  • Ameloblastic fibroma
  • Ameloblastic fibrodontoma
• Mesenchymal
  • Odontogenic fibroma
  • Myxoma
  • Cementoblastoma

Malignant

• Epithelial
  
  • odontogenic carcinoma
• Mixed
  
  • Ameloblastic fibrosarcoma

Question 2

List NON-ODONTOGENIC MANDIBLE TUMOURS

Answer 2

Benign

• vascular / hemangioma
• osteoid osteoma
• osteoma
• giant cell granuloma
• Fibrous dysplasia / cherubism
• Mandibular / condylar hyperplasia
• non-tumour masses: infectious / inflammatory

Malignant

• Most common is direct extension from oral cavity / oropharynx (mostly SCC)
• osteosarcoma (#1 1’ mandibular malignancy)
• Direct extension from major/minor salivary gland tumour: mucoepidermoid Ca, adenoid cystic Ca
• Leiomyosarcoma
• Fibrous histiosarcoma

Question 3

What is your differential diagnosis for short maxilla?

Answer 3

• Congenital
  
  • Cleft lip / cleft palate
  • Atypical cleft
  • Binder syndrome
• Acquired
  
  • Trauma
  • Recurrent / failed previous surgery

Question 4

What is your differential diagnosis for asymmetric mandible?

Answer 4

Hypoplasia

• Congenital:
  
  • Craniofacial / hemifacial microsomia
  • Parry Rhomberg Syndome
  • Mandibular / Condylar hypoplasia
• Acquired
  
  • Trauma
  • RA/JRA
  • Infection

Hyperplasia

• Congenital
• Progressive
  
  • Fibrous dysplasia
  • Mandibular hyperplasia
  • NF-1
• Acquired
  
  • Tumor

Question 5

What mandible tumours require excision?

Answer 5

1. All malignant tumours +/- radiation/chemo +/- neck dissection
2. Benign epithelial tumours: ameloblastoma, calcifying epithelial odontogenic tumour
3. Benign mixed tumours: odontoameloblastoma
4. Benign mesenchymal tumours: odontogenic myxoma