A 15-year-old girl consulted for this acquired pigmented lesion on her lower lip.
This lesion was solitary.
Dermoscopy revealed a pigmentation with a parallel pattern of light-brown to dark-brown streaks which were linear or curvilinear.
This dermoscopic presentation was quite typical of lentigos of the mucous membranes.
We must note that melanoma-specific criteria (atypical pigment network, irregular dots and globules, blue-white veil etc...) are not found in benign lentigos of the oral and genital mucous membranes.
In our case, a biopsy was performed and confirmed the diagnosis of benign labial lentigo.