Hi , I'm James DVM MRCVS and would like to help you with your problem
Forhow long has it been like
Have you seen anything else that's not right about her or is she otherwise fine
about three months
She seems fine
Is there anything coming out of the lump , like and fluid, puss or oily material?
Is there any pain when when touching the lump?
There are several conditions which can describe the symptoms which Misty is showing
1. It could be a trapped subecus gland. these a re hair gland which produce oil like material to oil the hair and at times they get trapped under the skin and create a lump
2. an abscess , form a cat fight for ex which has been growing , these ones are usually more painful
3. a foreign body , a thorn which could have gone under the skin and grated a small cyst
4. Cat are very sensitive when they are injected with medication and vaccination between the shoulder blades . this at times can develop to a type of cancer called Sarcoma which is considered very dangerous and should be removed as soon as possible.
I can really tell the location of the lump but all of the above are to be considered as a valid possibility .
What needs to be done is to have it examined by the vet , he can place a needle inside the lump and tell you it's content by looking under the microscope
There is no hurry though and I would not rush to see the OHH vet
as it would be dear and unnecessary.
Mean while , as long as she is fine , make sure not to touch it or aggravate it in any way.
if it does start to ooze out any material , make sure to take note if it and keep it clean by using diluted salt water
I hope this help.
If you have any other question on the matter I would be happy to help
As you seem to have left the conversation , I would be about to answer any other question on the matter if you have any . just write it down and I shall do my best to come back as quickly as possible.