Leukoplakia? Or just normal tongue tissue

[Curlygurl105]

I recently noticed a clearish whiteish marking on the left side of my tongue. It is next to a capped tooth but it isn't painful at all and isn't elevated. It's totally smooth and I wouldn't know it was there if I hadn't been inspecting my mouth.
My dentist yesterday did an oral cancer screening and said my mouth looks normal but then I noticed this and am getting worried. Is it possible he missed this and it is leukoplakia? Thanks

 

[honestdoc]

It's hard to see due to some glare (shine) at the white area. Abnormal white tissue usually presents as a callous or thickening of the skin.