A palatal ulcer that will not heal
A 61-year-old man with a 40 pack-year smoking history has a 1.8 cm indurated ulcer on the left soft palate, present for 7 weeks. It is fixed to underlying tissue, non-tender, and does not bleed. He has no fever, no cervical lymphadenopathy, and no recent trauma. He wears a partial denture but the lesion is not at the denture border. Incisional biopsy shows a surface epithelium with full-thickness atypia and a subepithelial infiltrate of atypical squamous cells with keratin pearls; the deep margin is not seen. He asks whether this could be 'just a denture sore' and whether he needs imaging before surgery.
1. How do you interpret the biopsy, and what does the missing deep margin mean for staging and planning?
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The biopsy shows squamous cell carcinoma (full-thickness epithelial atypia plus invasive atypical squamous nests with keratinization), not a denture sore. The absence of a deep margin means the biopsy cannot establish depth of invasion or confirm complete excision - both are staging and prognostic variables (depth of invasion affects T category in oral cavity cancer).
Judgment point: an incisional biopsy that confirms malignancy but does not sample the base is adequate for diagnosis but inadequate for staging. The next step is definitive resection with adequate margins, not a second incisional biopsy, provided the clinical picture and imaging support it.
2. What imaging and staging workup would you order before definitive surgery, and why?
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- Contrast-enhanced CT or MRI of the neck to assess deep extent, bone involvement, and nodal disease; the palate's thin mucosa means deep spread can be underestimated clinically.
- Neck imaging is warranted even without palpable nodes, because occult nodal disease is possible with a lesion of this size and smoking history; sentinel node biopsy or elective neck dissection may be considered depending on depth.
- Chest imaging for staging in a heavy smoker.
- Confirm no synchronous second primary in the aerodigestive tract.
Rationale: treatment planning (resection margins, neck management) depends on depth of invasion and nodal status, neither of which the biopsy established.