EN
Tumours of the gall bladder constitute 4-5% of tumours originating from the bile duct epithelium. The mucous cystadenoma is a rare benign neoplasm of the gall bladder. This study is the case presentation of a male Scottish terrier, aged 12 years. The dog presented weakness, vomiting, loss of appetite and enlargement of the abdominal cavity. The ultrasound examination showed an enlarged gall bladder, filled with heteroechogenic, amorphic contents. By the walls the contents of the bladder were hypoechogenic, about 0.3cm thick. The laboratory blood tests showed leukocytosis, an increase in AST, ALT, GGTP activity and an over 65-fold increase in ALP. In addition, hyperlipidemia was observed in the dog. The following drugs were administered: amoxycyline, ursodexycholic acid, S-adenosine-L-metionin. The control blood tests were performed every three weeks. During the entire period of the therapy significant differences in ALP and ALT activity were observed. After three weeks since the beginning of the therapy ALP activity decreased to the half of the initial value and the significant improvement of the dog’s clinical condition was noted. After the six-month therapy the administration of ursodexycholic acid was stopped for four months. The significant increase in ALP and ALT was observed in this period. Due to the worsening of biochemical blood parameters the therapy with ursodexycholic acid was restarted. On the account of old age and lack of recovery the dog was subjected to euthanasia and autopsy after an eighteen-month therapy. The postmortem examination revealed the normal size liver. The gall bladder was considerably enlarged. The wall of the bladder was irregularly thickened. Based on the histopathological examination, the mucous cystadenoma of the gall bladder was diagnosed.