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Figure 1. Clinical examination of the clinical case. (A) Squamous cell carcinoma on the lateral right side of the tongue, with a reticular lichen planus. (B) Reticular lichen planus on the lateral left side of the tongue, with no symptoms. (C) Reticular lichen planus on the cheek mucosa, with no symptoms.
Figure 2. Histological examination of the tumor after surgical glossectomy: squamous cell carcinoma differentiated and infiltrant.
Figure 3. Follow-up at 18 months after surgery (A) Right side: healing very well and no recurrence. (B) Left side: an erosion appeared on the reticular LPO, biopsy showed no epithelial dysplasia.
Table 1. Diagnosis criteria of lichen planus in 2024