**6. Conclusions**

Duodenal disorders are the one among major gastrointestinal disturbances in dogs and it also interrelated to the other GI disturbances. Diagnosis of these disorders is a challenging one, due to their non-specific signs and hence, contrasts radiography and endoscopy which play a vital role in the diagnosis. Duodenoscopy is an efficient way of identifying the abnormalities of mucosal irregularities, distortion, ulceration, neoplasia, and inflammation of intestines, and it is very much useful for obtaining mucosal biopsy and duodenal juice for histopathological and bacteriological studies.
