Dwarf pea puffer with symmetrical nubs beneath mouth; lymphocystis?

Hi friends!

I have a question about one of our dwarf pea puffers. We've recently noticed a pair of nubs beneath their mouth. No other signs of distress that I can see -- still social, active and eating. The tank has two other dwarf puffers and a Florida flag that aren't exhibiting any similar symptoms.

What's really curious is that the bumps appear to be symmetrical; one on either side of the chin, and nowhere else on the body.

Might this be early lymphocystis?