Yeah, pretty serious. The PIC line his Mom mentioned is like an intravenous (IV) line. (You know, where they stick a needle in your vein & hook you up to a bag of fluid? Usually just before surgery, then as you recover & can drink, they take it out.) Except this is larger (ouch!), is sometimes placed in the upper chest, right into a major vein & delivers more nutrients than possible through an IV line. They would only do this, of course, when you can't eat or drink for days & you're continuing to lose weight.
His Mom explained earlier in this thread what they think made him so sick.