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==Diagnosis==
==Diagnosis==
===Clinical Signs===
===Clinical Signs===
*Weight loss
*Chronic diarrhoea, steatorrhoea
*Ascites, oedema or chylothorax may result if there is severe hypoproteinaemia or lymphatic obstruction
*Increased appetite
*Vomiting, lethargy and anorexia (less common)
===Laboratory Tests===
===Laboratory Tests===
====Haematology====
====Haematology====
*Lymphopaenia
*'''Panhypoproteinaemia'''
*'''Lymphopaenia'''
====Biochemistry====
====Biochemistry====
*Hypocholesterolaemia
*'''Hypocholesterolaemia'''
*Hypocalcaemia due to hypoproteinaemia, vitamin D and calcium malabsorption
*Hypomagnesaemia
====Other Tests====
====Other Tests====
*Faeacal α1-proteinase inhibitor concentrations may be used to confirm protein-losing enteropathy
===Diagnostic Imaging===
===Diagnostic Imaging===
Abdominal ultrasonography may reveal pleural fluid or ascites as well as help to narrow down other differential diagnoses. Mucosa of intestinal loops may appear thickened due to oedema.