Tumour Growth on Betta?

[JxsPxxle]

Asking for a friend, he sent me this picture of his Betta he has had for about 3 months now who appears to have grown a tumour around the gill area. Is this correct? Water parameters are fine, the tank was cycled prior to adding the fish and the only inhabitants are the fish and two nerite snails.

 

[Colin_T]

need better pictures.

it could be a fungal infection around the gill and pectoral (side) fin.