Gross lesions present in various organs and histological analysis following treatment with 17.5 mg/kg of busulfan. (A) Gross lesions, a. lung, b. liver, c. stomach, d. duodenum, e. rectum, f. urinary bladder. (B) Hematoxylin & Eosin staining analysis, a. lung (50x), b. liver (50x), c. stomach (50x), d. duodenum (50x), e. rectum (50x), f. urinary bladder (50x). The scale bars indicate 100 μm.