Chapter 19 - Head and Neck++ Flashcards
Anterior neck triangle:
sternocleidomastoid muscle, sternal notch, inferior border of the digastric. Contains carotid sheath
Posterior triangle of neck:
posterior border of the sternocleidomastoid muscle, trapezius muscle, clavicle. Contains spinal accessory nerve.
Where is the phrenic nerve located in the neck?
on the anterior scalene muscle
What do the parotid glands secrete?
mostly serous fluid
What do the sublingual glands secrete?
mostly mucin
What do the submandibular glands secrete?
50/50 serous/mucin
In the larynx, what are superior, true or false vocal cords?
false
Where does the vagus nerve run in the neck?
between the IJ and Carotid
What are the branches of the trigeminal nerve?
ophthalmic, maxillary, mandibular
What are the branches of the facial nerve?
Commonly damaged during parotid surgery. Most resolve over a period of time.
- temporal
- zygomatic
- buccal
- marginal mandibular (corner of mouth)
- cervical
Prevention of injury here is w/ meticulous dissection when dissecting branches off the parotid.
What does the glossopharyngeal nerve do?
sensory to posterior tongue
motor to stylopharyngeus
injury affects swallowing
What does the hypoglossal nerve do?
motor to all of tongue except palatoglossus
tongue deviates to the side of the injury
What does the recurrent laryngeal nerve do?
innervates all of the larynx except cricothyroid muscle
What does the superior laryngeal nerve do?
innervates cricothyroid muscle
What is Frey’s syndrome?
Occurs after parotidectomy.
Injury of auriculotemporal nerve that then cross innervates with sympathetic fibers to sweat glands of skin.
Gustatory sweating dx by Minor starch/iodine test.
Tx: application of antiperspirant to the involved skin; if fails, surgical interruption of the secretory fibers by tympanic neurectomy; botulinum injection also an option.
Thyrocervical trunk?
STAT: suprascapular artery transverse cervical artery (trapezius flap) ascending cervical artery inferior thyroid artery
What is the first branch of the external carotid artery?
superior thyroid
What artery is the trapezius flap based on?
transverse cervical artery
what is the pectoralis major flap based on?
thoracoacromial artery
What is torus palatini?
Congenital bony mass on upper palate of mouth.
Do nothing - can resect if sx or need dentures/prosthetics.
What is torus mandibular?
congenital bony mass on anterior lingual surface of mandible
What is a radical neck dissection?
Takes accessory nerve (XII), sternocleidomastoid, internal jugular, omohyoid, submandibular gland, sensory nerves C2-C5, cervical branch of facial nerve, ipsilateral thyroid.
Most morbidity from accessory nerve resection
What is a modified radical neck dissection?
Takes omohyoid, submandibular, sensory c2-c5, cervical branch of facial nerve, ipsilateral thyroid.
No mortality difference b/w radical and modified.
What is the most common canceer of the oral cavity, pharynx, larynx?
squamous cell carcinoma
What is the biggest risk for oral cancer?
tobacco and etoh
what is more premalignant, erythroplakia or leukoplakia?
erythroplakia
What does the oral cavity include?
mouth floor anterior 1/3 of tongue gingiva hard palate anterior tonsillar pillars lips
what is the most common site for oral cavity ca?
lips
what oral cavity site has the lowest survival rate?
hard palate - hard to resect
What is plummer-vinson syndrome?
glossitis, angular chelitis koilonychia cervical dysphagia from esophageal web iron deficiency anemia increased oral CA risk
Treatment for oral CA?
4cm, nodes, bone - wide resection of 2cm, MRND, adj XRT
re-resect for close/positive margins
+/- chemo
Why are lower lip lesions more common?
Sun exposure. May need flaps if more than 1/2 lip removed. Commissure lesions most aggressive.
SCC is the most common skin cancer of lower lip.
Tongue Ca - can you still operate with jaw invasion?
Yes
What is a verrucous ulcer?
well differentiated tumor of the cheek
not aggressive
tx: full cheek resection, +/- flap, no MRND
What do you do with cancer of maxillary sinus?
maxillectomy
Nasopharyngeal Ca: cause, psx, dx, tx
psx: EBV assn; nosebleeds or obstruction; often painless neck mass at posterior/deep cervical nodes
dx: endoscopic biopsy, MRI nasopharynx/skull base/neck; stage w/ bone scan and CT chest/abdomen; EBV DNA lvls (prognostic)
- stage I: XRT
- stage II or more: chemoradiation
- kids - lymphoma, chemo
- papilloma - most common benign neoplasm
Oropharyngeal SCC
- neck mass, sore throat
- goes to deep nodes
- tx: XRT vs transoral laser microsurgery/robot surgery
- favor RT alone if old or poor fct status
Tonsillar CA
ETOH, tobacco
- asymptomatic until large
- tonsillectomy for biopsy, XRT
Hypopharyngeal SCC
hoarseness, early mets
- goes to anterior cervical nodes
- tx: XRT vs transoral laser microsurgery/robot surgery
- favor RT alone if old or poor fct status
Nasopharyngeal angiofibroma
benign tumor
- presents in males <20 years old
- vascular
- angio and embo (usually internal maxillary a)