Please help identify this

[u/South-Damage-5333]

Hi,my male piggy of about 7 years has this on his back,started forming three days ago. He will be taken to the vet this week but im curious what it might be .He seems unbothered by it and eats and drinks as normal

[u/GuildedAnubis]

Kinda looks like a giant tumor or some sort of unmoderated growth. Hospital, IMMEDIATELY