Madelung's Disease (also called Multiple Symmetrical Lipomatosis [MSL], Benign Symmetric Lipomatosis or Lanois-Bensaude Syndrome) is a metabolic condition characterized by the growth of fatty masses around the face, back of the head, neck, upper arms, abdomen, back and upper leg in a very specific pattern or distribution. Unlike the usual lipoma, these benign, fatty masses are not enclosed within a membranous capsule with very distinct boundaries. It is because of this characteristic, as well as the absolute symmetry in their occurrence, that the condition is often dismissed as simple obesity.