Beyond the lips: Guidance for intraoral procedures

NEW YORK –The work of the dermatologist doesn’t need to stop at the lips, according to Nasim Fazel, MD, DDS, a board-certified dermatologist and dentist. With a light touch driven by understanding of the oral mucosa, dermatologists can confidently obtain high-quality specimens and manage many intra-oral cutaneous conditions, she said, speaking at a session focused on oral health and procedures at the American Academy of Dermatology summer meeting.

Whether to perform an incisional or excisional biopsy on the lips or within the oral cavity is a decision driven by the clinical scenario, said Dr. Fazel, professor of clinical dermatology and director of the oral mucosal disease clinic at the University of California, Davis. Variables to consider, she said, include the size of the lesion, as well as whether the lesion is symptomatic or there’s any functional impairment. Other factors to bear in mind are whether the patient has any comorbid inflammatory conditions and whether the lesion could be malignant.

An excisional biopsy is a good procedure for small lesions that are thought to be benign, especially if they are exophytic, she noted. An example would be a traumatic fibroma, she said. This technique is also appropriate if there’s concern for dysplasia or malignancy if an office excisional biopsy is feasible given lesion size and location.

On the labial mucosa, an elliptical incision is often a good choice.
 

Cutaneous lip procedures

On the cutaneous lip, a punch incision can be feasible. The vermilion border should be marked to maintain orientation. “Avoid transecting the vermilion border to the extent that it’s possible,” said Dr. Fazel. Keep the vascular anatomy in mind as well, she added, since there’s a risk of severing the superior or inferior labial artery with procedures in this area. If this should happen, the branch can be identified and ligated with 4-0 fast gut or chromic gut suture material, she advised.

Another option on the cutaneous lip is shave removal. Here, a chalazion clamp can be used for both exposure and hemostasis. “Always suture parallel to the lip lines, and caution the patient that there may be significant, noticeable blanching when lip anesthesia’s used,” she said.
 

Gingival and tongue procedures

Moving to territory that may be less familiar for some dermatologists, Dr. Fazel walked through the process of a gingival punch biopsy. “Use local anesthetic, but a small quantity is sufficient,” she said. Using gentle pressure, the operator can work the punch instrument down to periosteal bone. At that point, just scissors can be used for undermining the specimen, with minimal disturbance of the mucosal surface.

Hemostasis after a gingival punch can be accomplished with silver nitrate or aluminum chloride or by electrocautery. A permanent defect in the gingiva can occur even with good technique, she said – a fact that should be included in the informed consent document for the procedure.

For lesions on the tongue, a shave removal can be considered, as can an incisional punch biopsy. An assistant’s hands are invaluable for stabilizing the tongue, said Dr. Fazel, illustrating that small dry gauze squares help achieve a good grip.