Atrophy of the left lobe of the liver is mostly seen due to cirrhosis, stones and tumors. 1. Cirrhosis of the liver, such as drinking alcohol for many years, hepatitis virus-induced cirrhosis, will cause serious reduction of liver cells, which will lead to atrophy of the liver lobe. 2. Stones, as stones are most common in the left lobe of the liver, and long-term obstruction of stones will affect the blood flow of the liver, which will lead to atrophy, and stones will affect the discharge of bile, which will repeatedly cause inflammation and malnutrition, which will further aggravate the atrophy. 3. Malignant tumor of liver, generally speaking, liver cancer will cause liver enlargement, but some cases will cause liver atrophy. It is recommended to consult regular hospitals for relevant examination and targeted treatment under the guidance of professional doctors.