Pathology · patient case question
Which agent is most appropriate for this patient's mucositis pain?
Patient case: Oral pain during head and neck radiotherapy
Patient: Female, 61 years old
Chief Complaint: “My whole mouth is raw and I can barely eat.”
Background: Currently in week four of radiotherapy for a squamous cell carcinoma of the tonsil, with concurrent chemotherapy.
Current Findings: Diffuse erythema and confluent ulceration of the buccal and labial mucosa and the soft palate. The pain is generalised and clearly NOT of dental origin. No white plaques that can be wiped off. No individual tooth is tender to percussion. Salivary flow markedly reduced.
Show answer and explanation
Correct answer: B. Viscous lidocaine
- A. Nystatin treats candidiasis. There are no removable white plaques and no other features of candidal infection — though candidiasis is a common SUPERIMPOSED problem in this population and should be watched for.
- B. CORRECT. The problem is generalised mucosal pain from radiation and chemotherapy mucositis. Viscous lidocaine 2% provides topical anaesthesia across the whole affected surface, letting the patient eat and maintain nutrition — which matters enormously during cancer treatment. It is often compounded into a 'magic mouthwash' with diphenhydramine and an antacid coating agent.
- C. Alcohol-containing chlorhexidine stings intensely on ulcerated mucosa and has no demonstrated benefit in preventing or treating mucositis. An alcohol-free formulation may be used for plaque control, but not for this pain.
- D. There is no evidence of bacterial infection here. Antibiotics do not treat mucositis and expose the patient to superinfection and Clostridioides difficile risk.
Note: Warn the patient about numb mucosa: no hot food or drink while anaesthetised, and take care not to bite the tongue or cheek. Round out the regimen with bland saline or sodium bicarbonate rinses, meticulous atraumatic hygiene, and daily neutral sodium fluoride to counter the radiation caries that follows the xerostomia.