A 62-year-old male farmer presents with a 1.2 cm exophytic squamous cell carcinoma of the mid portion of the LOWER lip. There is no palpable cervical lymphadenopathy and imaging shows no nodes. Which statement about management of the neck is most appropriate?
- A Elective supraomohyoid neck dissection is mandatory because occult metastasis exceeds 30 percent
- B Bilateral elective irradiation of levels II to IV is standard even for T1 lesions
- C The clinically negative neck may be safely observed, since the occult metastatic rate for small lower lip cancers is below 10 percent ✓
- D Neck management can be deferred until the patient develops facial nerve palsy
Correct answer: C. The clinically negative neck may be safely observed, since the occult metastatic rate for small lower lip cancers is below 10 percent
Explanation
The lower lip accounts for about 90 percent of lip cancers and, because of its sparse lymphatics, small well lateralized lower lip carcinomas carry an occult nodal risk under 10 percent, so observation of the cN0 neck is accepted practice. Elective dissection is considered for larger tumors, upper lip or commissure primaries, or recurrent disease, where nodal risk rises significantly.
Reference: Bailey and Love's Short Practice of Surgery, 28th ed.
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Written and medically reviewed by the StethoPrep medical team.