What is the life expectancy of a chronic lgl leukemia patient?

Leukemia: It's hard to tell as it takes different course in different patients. Some have more, some have less expectancy. It's easier to estimate when it's end stage, of course, but without further information from your end, it's very hard to tell.

Usually long: Lgl is usually indolent and may nto require any intervwention for long time, you need to follow up regualrly with your hematologist.