OMSITE Exam Questions & Answers
(Grade A+)2026
2 variations of nasolabial flaps -
correct answer ✅Island Flap with a subq tissue pedicle
Peninsular flap with a cutaneous pedicle
Hallmarks of Treacher Collins abnormalities -
correct answer ✅Maxillary/mandibular hypoplasia
Cleft lip/palate
Choanal atresia
Microtia and associated condyctive hearing loss
Hypoplasia of lower eyelids/lateral canthus
orbital hypoplasia and antimongoloid palpebral fissures
Biggest concern for a baby born with Treacher collins syndrome? -
correct answer ✅Airway compromise
- choanal atresia and severe retrognathia
secure airway with positioning all the way to tracheostomy
At what ages do you do recons for Treacher Collins patients
- what 3 major things are reconstructed? -
correct answer ✅>7 years for orbitozygomatic complex
(maturation at 8)
,OMSITE Exam Questions & Answers
(Grade A+)2026
>7 years for Ear
Skeletal maturity for orthognathics
What is the spectrum for Branchial Arch syndromes? -
correct answer ✅OAV- orbital-auriculo-vertebral spectrum
2 major classifications for Branchial Arch Syndromes
- what do the 2 classifications represent? -
correct answer ✅OMENS- comprehensive
Kaban/Pruzanksy- mandibular only
What is the OMENS classification for? what does it stand for? -
correct answer ✅OMENS: Comprehensive system for Branchial
arch syndromes
- Orbital distortion
- Mandibular hypoplasia
- Ear anomalies
- Nerve involvement
- Soft tissue deficiency
,OMSITE Exam Questions & Answers
(Grade A+)2026
What arches fail to develop resulting in Cleft lip/palate? -
correct answer ✅Branchial arch 1/2 leading to failure of
neuroectodermal fusion
What is the most common craniofacial defect? whats the second? -
correct answer ✅Cleft lip/palate
Hemifacial microsomia
What is another term for hemifacial microsomia? -
correct answer ✅Unilateral otomandibular dysostosis or lateral
facial dysplasia
How is Hemifacial Microsomia (HFM) and Goldenhar syndrome
related? -
correct answer ✅HFM and Goldenhar syndrome are considered
varients under the same clinical continuum termed OAV's (orbit-
auricular-vertebral). Goldenhar has HFM as well as vertebral and
epibulbar dermoid anomalies
1st and 2nd branchial arches are formed by what cells? -
correct answer ✅Neural Crest cells (NCC)
, OMSITE Exam Questions & Answers
(Grade A+)2026
First branchial arch syndrome affect what anatomy? -
correct answer ✅maxilla, mandible, zygoma, muscles of
mastication, trigeminal nerve, anterior auricle (tragus,helix) ,
malleolus, incus
Second branchial arch syndromes affect what anatomY? -
correct answer ✅hyoid bone, facial expression muscles, stapes,
antihelix/antitragus/ lobule
Etiology of Hemifacial Microsomia? (HFM) -
correct answer ✅Vascular injury to the stapedial artery and
anomalous migration of neural crest cells
What artery supersedes the external carotid artery? -
correct answer ✅Stapedial artery
Impaired VEGF can damage blood supply to Meckels cartialge
leading to what? -
correct answer ✅mandibular hypoplasia and deformation of
malleus/incus
(Grade A+)2026
2 variations of nasolabial flaps -
correct answer ✅Island Flap with a subq tissue pedicle
Peninsular flap with a cutaneous pedicle
Hallmarks of Treacher Collins abnormalities -
correct answer ✅Maxillary/mandibular hypoplasia
Cleft lip/palate
Choanal atresia
Microtia and associated condyctive hearing loss
Hypoplasia of lower eyelids/lateral canthus
orbital hypoplasia and antimongoloid palpebral fissures
Biggest concern for a baby born with Treacher collins syndrome? -
correct answer ✅Airway compromise
- choanal atresia and severe retrognathia
secure airway with positioning all the way to tracheostomy
At what ages do you do recons for Treacher Collins patients
- what 3 major things are reconstructed? -
correct answer ✅>7 years for orbitozygomatic complex
(maturation at 8)
,OMSITE Exam Questions & Answers
(Grade A+)2026
>7 years for Ear
Skeletal maturity for orthognathics
What is the spectrum for Branchial Arch syndromes? -
correct answer ✅OAV- orbital-auriculo-vertebral spectrum
2 major classifications for Branchial Arch Syndromes
- what do the 2 classifications represent? -
correct answer ✅OMENS- comprehensive
Kaban/Pruzanksy- mandibular only
What is the OMENS classification for? what does it stand for? -
correct answer ✅OMENS: Comprehensive system for Branchial
arch syndromes
- Orbital distortion
- Mandibular hypoplasia
- Ear anomalies
- Nerve involvement
- Soft tissue deficiency
,OMSITE Exam Questions & Answers
(Grade A+)2026
What arches fail to develop resulting in Cleft lip/palate? -
correct answer ✅Branchial arch 1/2 leading to failure of
neuroectodermal fusion
What is the most common craniofacial defect? whats the second? -
correct answer ✅Cleft lip/palate
Hemifacial microsomia
What is another term for hemifacial microsomia? -
correct answer ✅Unilateral otomandibular dysostosis or lateral
facial dysplasia
How is Hemifacial Microsomia (HFM) and Goldenhar syndrome
related? -
correct answer ✅HFM and Goldenhar syndrome are considered
varients under the same clinical continuum termed OAV's (orbit-
auricular-vertebral). Goldenhar has HFM as well as vertebral and
epibulbar dermoid anomalies
1st and 2nd branchial arches are formed by what cells? -
correct answer ✅Neural Crest cells (NCC)
, OMSITE Exam Questions & Answers
(Grade A+)2026
First branchial arch syndrome affect what anatomy? -
correct answer ✅maxilla, mandible, zygoma, muscles of
mastication, trigeminal nerve, anterior auricle (tragus,helix) ,
malleolus, incus
Second branchial arch syndromes affect what anatomY? -
correct answer ✅hyoid bone, facial expression muscles, stapes,
antihelix/antitragus/ lobule
Etiology of Hemifacial Microsomia? (HFM) -
correct answer ✅Vascular injury to the stapedial artery and
anomalous migration of neural crest cells
What artery supersedes the external carotid artery? -
correct answer ✅Stapedial artery
Impaired VEGF can damage blood supply to Meckels cartialge
leading to what? -
correct answer ✅mandibular hypoplasia and deformation of
malleus/incus
