Hi ! Good evening. I am Dr Shareef answering your query. Although it can not be ascertained, it could be related to the 4 wheeler wreck last april. Pancreatitis can be ruled out as the serum lipase level is rather lower than normal. There possibly was some kind of traumatic peritoneal inflammation or some kind of minor bruise of the kidneys at the time of wreck, which has resulted in accumulation of fluid around the kidneys. As there are no emergent features of any active intervention at present, the doctors in the ER might have decided to observe him closely through the family physician before deciding any further course of action. They might call him for another follow up CT scan after some time depending on the course of the disease. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. I wish you an early recovery. Dr Shareef.