At first the Doctor doesn't notice too much apart from an abundance of hair also growing in near the wound on your arm. You start to fidget around as he continues, your ass unable to get comfortable on the stainless exam table. It feels like you're sitting on a rock. You dare not face the Doctor's scorn again however by interfering with his work and are only relieved when he commands you to roll onto your side.
"Ah, what is this..." You're not sure what he's talking about, however the closest sensation you could describe it as would be the feeling of trying to pull on a sock with one toe still sticking out. Except this time the feeling is with the waist band of your underwear. Catching on something between your upper butt cheeks... "If I'm not mistaken, your tailbone is no longer fused. It's actually a small protrusion now. Vestigial at best, but that is most definitely a tail... I need a better look." Without permission he begins to pull your underpants down towards your feet.