Hypopharyngeal Cancer: Anatomy – Flashcards
Unlock all answers in this set
Unlock answersquestion
Anatomic role for hypopharynx
answer
links oropharynx to esophagus
question
Superior/inferior extent of hypopharynx
answer
Sup- hyoid inf- lower level cricoid
question
Superior boundaries of hypopharynx
answer
Valleculae pharyngoepiglottic fold aryepiglot folds
question
Anatomic landmark at sup border of hypopharynx
answer
C4
question
Subdivisions of hypopharynx
answer
Pyriform sinus, Pharyngeal walls Postcricoid pharynx
question
Ant boundaries of pyriform sinus
answer
Soft tissues of neck
question
Lat boundaries of pyriform sinus
answer
Thyroid cartilage
question
Med boundaries of pyriform sinus
answer
Larynx
question
Sup boundaries of pyriform sinus
answer
Pharyngoepiglottic fold, AE fold
question
Inf boundaries of pyriform sinus
answer
Apex of pyriform sinus
question
Where does apex of pyriform sinus terminate
answer
Can be from top to bottom of cricoid
question
How far inferior is apex of pyriform sinus
answer
Beyond vocal cords, occas beyond cricoid
question
Relationship to int branch of sup laryngeal nerve
answer
Passes through thyrohyoid membrane
question
Relationship to thyrohyoid membrane
answer
Membrane surrounds pyriform sinus
question
Where is postcricoid region
answer
Posterior to arytenoids and cricoid ring
question
Where does postcricoid pharynx begin
answer
Just below arytenoids
question
Where does postcricoid pharynx extend to
answer
Junction b/w pharynx and esophagus
question
Post pharyngeal wall is made of
answer
Middle/inf pharyngeal constrictors
question
Inferior pharyngeal constrictor also known as
answer
cricopharyngeus
question
Innervation of hypopharynx
answer
Glossopharyngeal and vagus nerves
question
What nodal levels do hypopharyngeal tumors go
answer
level II/III, retropharyng, rouviere, spinal accessory
question
Lowest portion of hypopharynx drains to
answer
Follows recurrent laryngeal (SC,paratrach/esoph)
question
Nodal difference between pyriform sinus/post pharyng wall
answer
Post pharyngeal wall also drains to submaxillary
question
What % pyriform sinus present with nodal mets
answer
75%
question
What % T1 pyriform sinus present with nodes
answer
60%
question
What % pryiform sinus have bilateral nodes
answer
15-30%
question
What % hypopharyngeal CA have bilateral nodes
answer
30%
question
What % hypopharyngeal CA have post triangle nodes
answer
15%
question
What % hypopharyngeal CA have contralat level V nodes
answer
2%
question
What % post pharyngeal wall CA have RP nodes
answer
40% !!
question
Most common contralat neck site for hypopharyngeal CA
answer
submaxillary
question
How does T stage affect likelihood of nodal involvement
answer
Virtually unrelated
question
Where do cancers of medial pyriform sinus extend to
answer
Aryepiglottic folds,arytenoids,paraglottic/PES
question
Where do cancers of lateral pyriform sinus extend to
answer
Post pharynx, thyroid ala/gland
question
Where do cancers of postcricoid region extend to
answer
posterior cricoarytenoid muscles,cricoid
question
Where do cancers of post pharyngeal wall extend to
answer
NPX,esoph,retropharyngeal space
question
Spread to what areas indicate poor prognosis
answer
Pyriform apex, post-cricoid, 2-3 wall tumors
