Lip Cancer and Reconstruction Flashcards
What is the relationship of the facial artery to the risorius and the buccinator?
Deep to the risorius
Superficial to the buccinator
What artery does the superior labial artery give off prior to entering the orbicularis oris?
Angular artery
What is the ridge running from the nose to the lip
Philtral ridge
What are the purely labial consonants?
b
m
w
p
What are the labial dental consonants?
f
v
What is the most common location of oral cavity cancer?
Lip
Risk factors for lip cancer?
Sun exposure
Male sex
Smoking
Alcohol
What is the rule of 90% for lip cancer?
90% on the red lip
90% on the lower lip
90% SCC
Does BCC occur more commonly on the upper or lower lip?
Upper lip
What is the lymphatic drainage pattern of upper vs lower lip cancers?
Upper: IPSILATERAL level I-III nodes
Lower: IPSILATERAL and CONTRALATERAL level I-III nodes
What is the reason that upper lip cancers will not spread to contralateral nodes?
Embrylogical fusion in the midline prevents contralateral spread
T staging of lip cancer
T1: <2cm
T2: 2-4 cm
T3 >4 cm
T4: invasion of adj structures (cortical bone, skin, floor of mouth)
What size margins are typically needed around lip SCC?
0.5 cm
If lip defect includes 1/2 - 2/3 lip and involves oral commisure, what flap should be used?
Estlander flap
If lip defect includes 1/2 - 2/3 lip and does not involve oral commisure, what flap should be used?
Abbe flap
What flap is for use only in lesions of the red lip and is the favored method for restoration of the vermilion?
Mucosal advancement flap
How is a lip mucosal advancement flap performed?
Undermining of the labial mucosa deep to the minor salivary glands and superficial to the posterior aspect of the orbicularis
What is the arterial supply of the Abbe flap?
Superior or inferior labial artery, depending on the defect **can not include the commisure
How big should the Abbe flap be drawn?
Half the width of the defect on the opposite lip
How long until an Abbe flap pedicle can be divided?
14-21 days
