Sanitation of the oral cavity was initiated with periodontal scaling,
root planning, and the removal of the bridge. Regarding the blood test
results, all the hemogram parameters were found to be within the normal
range. Thyroid blood tests revealed a hypothyroidism FT4: 23,88 pmol/L
(10-22) and TSH<0,05 µL/ml (0.27-4,2), and an HCV serology
using ELFA (Enzyme-Linked Fluorescent Assay) was positive.
An incisional biopsy of the lesion was performed under local anesthesia
(Medicaine 2% with adrenaline 1/100.000®, Medis, Tunisia) from the left
buccal mucosa. The specimen was divided into two parts, the first was
kept in 10% formalin and submitted to the anatomopathological
examination and the second was immediately placed in saline solution and
immediately transported for direct immunofluorescence analysis.
The anatomopathological results revealed a band-like infiltrate made up
of lymphocytes and plasma cells associated
with liquefaction degeneration of the basal cell layer confirming the
diagnosis of erosive OLP (Figure 3).