Purpose: Pain due to oral-mucositis (OM) in head and neck cancer (HNC) patients receiving radiotherapy (RT) /chemo-radiotherapy (CRT) can be nociceptive and/or neuropathic. Neuropathic pain (NP) often remains underdiagnosed and untreated. This study's purpose was to identify the presence of OM-induced NP in HNC patients under RT/CRT.
Methods: Pain was assessed using a 0-10 numeric scale (NRS). At an NRS≥5 score, patients completed the Douleur Neuropathique 4 (DN4) questionnaire, where a score ≥4/10 indicates the presence of NP. Mucositis and xerostomia were assessed using the European Organization for Research and Treatment of Cancer and the NRS scales accordingly. Pain medication was documented.
Results: Forty patients were recruited; twenty-six (mean age 63.54±13.96 years) completed a DN4 (mean pain NRS 7.46±1.42); five (5/26, 19.23%) had a DN4≥4. The most common NP descriptors were "burning" (34.62%), "electric shocks" (30.77%) and "pins-and-needles" (30.77%). A direct correlation was observed between DN4 and pain, mucositis, and xerostomia (p<0.02). Pain medication was administered to fifteen patients (15/26, 57.69%). Adjuvant medication was administered to one patient with positive DN4 score.
Conclusions: Five (5/26, 19%) of the patients with NRS≥5 developed NP; adjuvant medication to address NP was prescribed to one patient. NP is likely underdiagnosed and undertreated in the HNC population undergoing RT/RC.
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