Hi Lady T!
I had a Lap in Januarty to remove an endo cyst and endo.
It's done as an outpatient (if on NHS) , they put you to sleep and stick a little camera through your belly button and make 2 incisions on your belly (in my case over ovary with cyst and c-section line - as that's where my endo was). They pump your belly with co2 to get some space.It lasts between 40 min and 2 hours, depending on what they find. they check your organs for endo, check your tubes etc, uterus etc.
it sounds scarry- and I was bricking it, but it wasn't that bad at all! the only discomfort you get is when the gas starts comming out, but the more you walk around , the quicker it goes. Oh and don't worry about scars, they are so tiny, I can hardly see mine!!!!!
good luck!