The results following liposuction in the neck region will depend upon the skin quality and quantity as well as the location of the fat. Many men in their fifties have a combination of excess skin, loosening tissues and excess fat.
Vaser liposuction, (and other types of liposuction), can removes some excess fat under the skin. Middle aged individuals will often have another layer of fat under the platysma muscles in the neck. Liposuction in the neck will not remove this deeper fat.
If your husband has very little excess skin and good skin elasticity, he may benefit from liposuction alone. However, if he has excess skin, this can become looser with the liposuction. In this case he may need a neck lift or a face lift, The lifting procedures support the loose underlying tissues, tighten the skin and remove excess fat.
Make sure your husband consults with a plastic surgeon experienced in both liposuction and neck lift surgery so he can provide the best recommendation for your husband's particular case.