lump on rats near right leg

Question
my rat seems fine but has a large lump on his belly near her right foot im concerned any thoughts on what it could be ????
sincerly, kayli

Answer
Probably a mammary tumor.   He needs to have it removed which can be done by a qualified vet.
Refer to my website, sandyscrittercity.com  to find info no tumors and surgery so you wont be so worried about the outcome. Its common for this to occur and not a huge deal to have them removed.

When did the lump first appear?