A young female patient presents with jaundice and elevated liver enzymes. She has a history of two smilar episodes in the past. Her serum ANA was 1:40 and IgG was 2400 IU. Her serum copper levels were normal and viral markers were negative. A liver biopsy was carried out and based on the pathology repo, you treated her with immunosuppressants and the patient's condition improved. What was the most likely finding on pathology repo to suggest the treatment?