Oral Surgery · patient case question
Which biopsy technique is most appropriate for this lesion?
Patient case: Persistent lower lip lesion
Patient: Female, 44 years old
Chief complaint: “There's a small lump on my lower lip that hasn't gone away.”
History: Reports occasional hoarseness of the voice over the past two months. No systemic disease.
Findings: A small, firm, well-defined nodule on the labial mucosa of the lower lip, present for more than five months and unchanged in size.
Show answer and explanation
Correct answer: D. Excisional biopsy
- A. Exfoliative cytology samples only surface cells. It cannot assess the architecture of a submucosal nodule, and a negative result would not be reliable. It is an adjunct, never definitive.
- B. Incisional biopsy is reserved for LARGE lesions over about 1 cm, diffuse or multifocal lesions, or lesions where malignancy is suspected and excision would be disfiguring or would compromise definitive surgical planning. A small discrete lip nodule does not fit.
- C. Fine-needle aspiration is valuable for deep masses and lymph nodes, particularly major salivary gland lesions, but for a small accessible mucosal nodule it gives less information than simply removing it.
- D. CORRECT. The governing rule is SIZE and accessibility, not duration. A lesion under about 1 cm that is well-defined and surgically accessible is removed entirely with a margin of normal tissue — an EXCISIONAL biopsy. This gives the pathologist the whole lesion with its architecture intact, and it is simultaneously diagnostic and therapeutic, sparing the patient a second procedure.
Note: The commonest lower lip nodule of this description is a mucocele or a fibroma, both of which are managed by excision anyway.