Hi Thank you for contacting healthcare magic. 1) Fatty liver is fatty deposition inside the liver. It is caused by obesity. No management needed except lifestyle modifications like brisk walk daily for 30mins for 5 days a week, avoid excess sugar & oily foods, reduce weight, quit alcohol. 2)Calculi & hydronephrosis - calculi are stones. Sometimes stones in the ureters (tubes that connect kidney with the urinary bladder) can block the urine flow from the kidneys leading to its accumulation and a swollen area of fluid around the kidney (hydronephrosis). Once stone is removed, obstruction will be gone. 3)Diverticulum is a pouch that comes through the intestinal wall. It can have infection & present a with abdominal pain. 4)Lymph nodes are small collections of immune cells that fight against infections. Once infected or diseased, they become enlarged. Treatment includes treating the underlying infection or cause. I have tried to explain as simple as I could. I hope I was able to make you understand. Take care