The presence of adipocytes in non-irradiated healthy (A–C, female; D–F, male), 6 years post-irradiated (G–I) and 6 months post-irradiated (J–L) head and neck cancer patients. Tiled images of SMG (hematoxylin and eosin [H&E] stain; A, D, G, J, magnification 10×, bars = 1 mm), adipocytes (B, E, H, K), and total tissue area (C, F, I, L) are shown.