Printed in Croatia

Conjoined twinning has been reported in most domestic animal species. It occurs extremely rarely in horses, occasionally in dogs and cats and more commonly in cattle than in the other ruminants. A pregnant ewe was referred to the Veterinary Clinic of Shahid Bahonar University of Kerman for dystocia, and a male dicephalic lamb was delivered, which survived for 8 hours. It was a co-twin to another male lamb which was clinically normal. After macroscopic and C.T. examination the lamb was carefully dissected and histopathologic slices from the testis, lymph nodes, spleen, liver, kidneys, lung, fore stomachs and abomasum were taken, prepared routinely and stained with hematoxylin and eosin. In this study the anomalies which were seen can be categorized to complete and incomplete duplication, lack of fusion and axial deviation. Key words: lamb, diprosopus, spina bifida, kyphoscoliosi