Can a spleen grow back from a rupture spleen spleenectomy?

Sometimes. There are parts of spleen that can be in the area that can grow -.
Not exactly. The spleen will not regenerate following its removal. However, if the spleen is shattered, sometimes a small piece may remain in the abdominal cavity and develop a new blood supply. Also, some people are born with accessory spleens that can become more functional after splenectomy.