I presume it's because they fused his whole spine when he was still a child. That stunted his torso from lengthening anymore, but his abdominal organs would have continued to grow until after puberty. They might not be full average adult size, but I bet they're still crowded. In addition to the fusion, he still appears to have considerable scoliosis which further "twists" everything.Does anyone know why Shane's ribcage is so distended all of the time? He's obviously malnourished, but it looks like all of his organs and then some are somehow pushing out his ribcage.