r/Doberman

Hi all, just wondering if anyone has had their dobie get a bump similar to the one pictured. This one is on his lower back and just feels like a hardened cyst almost. He’s had it for months and it hasn’t grown in size, and the vet didn’t seem concerned about it last time we were there. It’s just not going away and I know Dobermans are prone to skin issues so just wanted to see if anyone has experienced anything similar!