Pigmented Lesions: Amalgam Tattoo; Erosive Lichen Planus; Dysplasia - Velscope VX Examination Manual

Pigmented Lesions: Amalgam Tattoo

Pigmented lesions show a loss of fluorescence for the same reason that they appear pigmented under white light: absorption of light by the pigment.
One should expect the size and shape of the loss of fluorescence to be the same as the size and shape of the pigmented area under white light.

Erosive Lichen Planus

The intense inflammation associated with erosive lichen planus results in a pronounced loss of fluorescence.

Dysplasia

The hyperkeratotic area on the ridge is in fact dysplasia, and shows a strong loss of fluorescence.