lump on pedicle, question.

I have a tame yearling buck that has had a lump on his pedicle , it makes the pedicle appear almost twice the size as the other side. it is not getting any bigger it just appeared this size and has stayed this size but it has been a month, maybe more, since it appeared and its not going away. It appeared shortly after he hit the base of his anler on a board that suppports the feeder. I thought it was just a knot from the impact that would go away on its own. The lump is as hard as bone, it does not feel fluid filled. Also, I just noticed he just now started a little lump on the jaw on the same side as the pedicle, it also feels hard, like there is no fluid. It is only this size of a dime, or smaller, in diameter. Anyway I do not want to tranq him yet as he is still growing antler, but I do want to deliver the drug with a dart, what would be best to use? Draxin? Do i give it for several weeks? how much would you recommend? Thank you in advance for any help you can offer.

I tryed to show the lump on the bottom jaw, it is at the base of the jaw going in the the neck, it dosent show up good in the pic

I just took these pics today, I noticed some drainage in his nose. and he also wasnt being his usual tame self, he wanted to be alone. Anyway earlier today I darted him with draxin, just 2cc to see if he would clear up. When I went to feed him tonight he was dead. I just cant believe it, he got sick so fast. He was my first bottlefed ever. My favorite deer on the whole farm. I hope he didnt react to the meds. This is one of the worst days in my deer farming career, Its going to take a long time to get over his death, he was just so sweet, Always came to greet me, my only "pet" deer. I really feel bad because he died the same day I gave him meds. Was Draxin wrong to give. You will be missed Bucky.

I must thank you all for you kind words, I know its not only me that has bad things happen, we all do. I thank the Lord for every moment I shared with this deer. He was definatly one of a kind. I bought a bottle baby from a guy this year, she is only 2 weeks old, plus I had a doe fawn born last week that i am feeding, they sure make it easier to deal with his loss. Thanks again everyone.