Hi. Thanks for your query and an elucidate history. The high lactic acid and WBC levels are suggestive of an active infection or a physical stress. These tests have to be repeated to confirm again after some tine on the same day as a total bed rest and proper treatment would help them to come to normal. The more important problem here is pain in upper abdomen, cyst on the gall bladder is not at all common and can be a seat of a stone / sludge or infection and rarely cancer, hence should be removed once your Mother is physically fit as examined by your Doctors. Go for Surgery as you have asked for .