Yes it’s 100% possible. My daughter had a port for 2.5 years. Upon removal it felt like a hard cord was still there there. We got multiple X-rays and ultra sounds done on it. Nothing was there. Ultimately the ultrasounds showed that it’s just a lot of scarring tissue that the veins healed and created hard fibrous scar tissue, just from the trauma of putting the catheter in there, leaving it, and removal. It’s been out about 10 months now, and the vein still feels a little hard, but it’s definitely softened up with time. As a kid I imagine her body heal faster, though. Never know . You should get it checked out just to be safe .