This past Monday, my son, or "The Upgrade" as I call him, had an appointment with a pediatric orthopedic specialist. It turns out he has a congenital condition in his left arm called Radioulnar Synostosis. What that means is that his radius and ulna are fused together at their upper end. This prevent him from rotating his arm past 90 degrees, or supinating it at all. It's uncorrectable, so he'll never have full range of motion in that arm.
It hit me at a really rough time. I'm still dealing with regret about not living with him 24/7 since his mom and I broke up, it's the holidays and I'm struggling to afford any gifts for him, and now, I get to wonder if my crappy genetics brought this on him.
Still, he's such a happy, active 5-year-old, and such a loving, considerate child, I think he's more of a comfort to me than I to him at this point.