Juvenile Nasopharyngeal Angiofibroma (JNA) Anatomy: the Pterygopalatine Fossa

last modified on: Wed, 09/06/2017 - 10:54

Juvenile Nasopharyngeal Angiofibroma (JNA) Anatomy: the Pterygopalatine Fossa and Surrounding Structures

return to: Juvenile Nasopharyngeal Angiofibroma

see also: Juvenile Angiofibroma - Rads

 

JNA tumors most commonly originate from the sphenopalatine foramen or vidian canal, which are located at the medial or posterior border of the pterygopalatine fossa, respectively. The pterygopalatine fossa can be conceptualized as a pyramid-shaped space posterior to the maxilla's infratemporal surface.

 

 

  
  
 
Borders of the Pterygopalatine Fossa
BORDER
BONY STRUCTURE
 OPENING
 COMMUNICATING SPACE
Lateralopen to pterygomaxillary fissure pterygomaxillary fissure infratemporal fossa
Medialperpendicular plate of the palatine bone sphenopalatine foramennasal cavity 
Superiorinferior surface of the spenoid and the orbital plate of the palatine inferior orbital fissure orbit
Inferiorpyramidal process of the palatine palatine canal oral cavity
Posteriorpterygoid process of the sphenoid

1. foramen rotundum

2. pterygoid (vidian) canal

3. pharyngeal canal

1. middle cranial fossa

2. foramen lacerum

3. nasopharynx

Anteriorinfratemoral process of maxilla none none
 

 

Foramens of the Pterygopalatine Fossa
(anterior-to-posterior view of left pterygopalatine fossa)

Structures contained in Pterygopalatine Fossa 
(anterior-to-posterior view of left pterygopalatine fossa)