We distinguish three diseases: left-sided displacement, right-sided displacement and abomasal volvulus. Up to 57% of all displacements occur within the first two weeks after calving, and up to 80% within the first month after calving. Of all displacements of the abomasum, left-sided is the most common representing 85-95.8% of cases. Abomasal displacement never presents as primary disease but is always secondary to either mastitis, metritis, enteritis, peritonitis, hypocalcaemia, hypokalaemia, ketosis, or any other disease that leads to atony of the abomasum. Diagnosis is made on the basis of history, clinical examination and laboratory findings. Differential diagnosis should take into account traumatic reticulopericarditis, dilatation and atony of the rumen, pneumoperitonitis, rumen acidosis, and dilatation with caecal torsion and proximal convolutions of the colon. Treatment options include conservative and surgical methods. The rolling method and fluid therapy are conservative, each of which are unreliable in outcome. Therefore, the preferred treatment options are all surgical, including right percutaneous paramedian abomasopexy, and right paralumbar fossa omentopexy. The latter one being the method of choice. Surgical treatment of the abomasal displacements represent the largest part of all surgical procedures in cattle. The overall survival of surgically treated cattle in all forms of abomasal displacement is 85%. The leading cause of post-surgical mortality is seen after abomasal volvuli (67%), while lethal outcome after all other forms of abomasal displacement ranges between 8 and 12%.