Welcome to Healthcare-Magic
Thanks for the query. I am very sorry about your serious disease.
This is probably carcinosis and this is bad sign of cancer spreading usually means that no treatment is possible any more,just palliative. Such cancers usually spread mostly in abdominal cavity and death is caused by kachexia and general weakness due to inability to eat after bowel obstruction. Sometimes it goes into lungs and brain too.It is hard to predict the life expectanxy but it is usually 4-8 months.You ll be weaker and lose wieght rapidly,alos,you may feel nausea
and certain degree of abdominal pain
but it can be relived with medicines. There is possiblity of so called HIPEC therapy so ask your surgeon about it. I hope you ll find strength to live the rest of your life with positive energy.
Wish you good health.