A rare case of diprosopus,tetraophthalmus and meningoencephalocele in a lamb [Bir kuzuda nadir rastlanan diprosopus,tetraophthalmus ve meningoensefalosel olgusu]

A female,dystocic,two-headed dead lamb from a 3-year old sakiz sheep is described. the two faces of the foetus fused at occipital,partly parietal and temporal bones on a single trunk. on each face there were two eyes,one ear and one normally developed oral cavity with only one laryngopharynx and oesophagus. a flaccid,hyperemic,membrane-like tissue protruded from the defective frontal and parietal bones. there were no other skeletal abnormalities but incomplete costal articulation. microscopic examination of the membranous tissue revealed mostly autolytic neurons. since diprosopus cases with defective skull development and meningoencephalocele are rare events,this case was evaluated for presentation.