PDGFRα immunoreactivity in longitudinal muscle (A), myenteric plexus region (D), and circular muscle (G) from a control subject. PDGFRα immunoreactivity in longitudinal muscle (B), myenteric plexus region (E), and circular muscle (H) from a diabetic gastroparesis subject. PDGFRα immunoreactivity in longitudinal muscle (C), myenteric plexus region (F), and circular muscle (I) from an idiopathic gastroparesis subject. No differences were seen between the 3 groups. Scale = 100 μm