What is a panniculectomy?

I keep seeing "panniculectomy" and don't know what it means?  What is the difference between that and a tummy tuck?

that is where they remove just the flap of skin that hangs down from lower abdomen. i tummy tuck is where they remove the skin from the muffin top and tighten the skin up?

Why do people want a panniculectomy and not a full tummy tuck then??  I'm confussed

Insurance will sometimes pay for the panniculectomy  (because of issues with rashes) but will rarely pay for a tummy tuck (whi*****ludes tightening the abdominal muscles in addition to removing extra skin from the whole tummy and runs roughy $7000).

Lora

 A lot of insurances will pay for the panniculectomy but not the tummy tuck. It gets a lot more expensive with the tummy tuck because they do muscle tightening and some other extra things.