H&N Paranasal Sinus Anatomy

Question 1

The sphenopalatine artery enters the nasal cavity
through the sphenopalatine foramen, which is
located where?

Answer 1

Lateral nasal wall just posterior to the end of the middle

turbinate

Question 2

Which nerve originates in the pterygopalatine

fossa and innervates the hard palate?

Answer 2

Greater palatine

Question 3

The name of what line from the medial canthus to
the angle of the mandible carries significant
prognostic value in sinonasal malignancies?

Answer 3

Öhngren line. It is largely of historical significance when

plain X-rays were used to evaluate sinonasal malignancy.

Question 4

What are the anatomical boundaries of the

pterygopalatine fossa?

Answer 4

The pterygopalatine fossa is a pyramidal space beneath the
orbit that is bounded anteriorly by the posterior wall of the
maxillary sinus and posteriorly by the pterygoid plates.

Question 5

Which nerves and what important vessel run

through the pterygopalatine fossa?

Answer 5

Sphenopalatine, lesser and greater palatine nerves, Vidian;

internal maxillary artery

Question 6

What is the most common site of sinonasal

malignancy?

Answer 6

Maxillary sinus

Question 7

Tumors in which paranasal sinus are associated

with the highest rate of neurological sequelae?

Answer 7

Sphenoid sinus

Question 8

What is the most common lymph node basin

involved by metastatic sinonasal malignancy?

Answer 8

Upper jugulodigastric