TB is not officially diagnosed by any "look" , as many of the symptoms for TB are the same for MANY other issues...Many.......
Now I can't say 100% that it is not TB , nor can anyone looking say it is...
Disease id is not always easy or clear cut and this fish "looks" to have had some issues for a while now ,so all bets would be off IMO as secondary and stress, weakness issues are certainly involved at this point.
I would cull the fish and hope it was an age ,diet ,companion or genetic issue and keep a close eye on your other fish...
Good luck..