Rescue Snake - spine anomaly?

[Aercadia]

DH keeps eyes on Craigslist and spotted a "FTGH ball python" ad posted and looked into it... sad story: [dude] acquires BP, [dude] decides BP isn't cool anymore so [roomie] starts "caring" for it, [dude] splits and leaves the snake behind so [roomie] feeds it "when he has time", [roomie] and [other roomies] are being evicted and do not have the resources to continue to care for BP or take it with them.

BP is "female" (we are calling her a girl for now, since that's what they posted - we will determine for sure at a later time) - when DH went to pick her up, she was living in a 55 gal tank with ground coconut husk substrate, a "bowl" of filthy water, a tree branch laid on the bottom of the tank, no hides, a tiny head pad stuck to the side, and at least 4 sheds and a number of poops littering the enclosure, with more bad shed stuck all over her. [roomie] said that [dude] had her for about a year before he bailed, nobody has handled her at all since her acquisition, and he said she was eating "hopper rats".

I give this guy props for at least posting the ad and trying to find her a home, instead of just tossing her in a dumpster or abandoning her when they vacate. We were the only ones who answered the ad. I'm glad we did. This poor girl was in rough shape. She currently weighs in at 336 grams, and looks skinny. DH soaked her and cleaned the bad shed off, and she's looking a little better for that small effort. She is a nervous girl, but seems like she will come around. We set her up in quarantine, and we're not sure if we will keep the 55 gal tank she came with (we don't really have anywhere to put a tank that large) or if we'll clean it up and put it back up on CL.

Before we put her to bed, I took a couple of pictures of an anomaly on her back - at one point along her spine ridge, there is a dip and then a bump that looks "off" to us. We're wondering if this is a kink or some kind of spine damage, or maybe caused by a dietary deficiency. We looked at a number of pics/videos of kinked snakes, and it doesn't look nearly as severe as a lot of the kinks represented, so we're not sure... thought we would try and get some input from the good folks here.