Hypernatremia, Hyperlipemia and Hemorrhagic Enteritis in a Hypodipsic Dog with Corpus Callosum Dysplasia.

This case describes a rare presentation of hypodipsia in a 7-month-old female Labrador Retriever, attributed to congenital corpus callosum dysplasia and holoprosencephaly. Chronic hypernatremia in the patient was consistently associated with severe hyperlipemia, which was further complicated by hemorrhagic enteritis and sepsis-associated liver dysfunction. Persistent hyperlipemia was observed during the hypernatremic crisis but resolved following the restoration of adequate water intake and the subsequent correction of hypernatremia. The association between hyperlipemia and hypernatremia is unusual, with only a limited number of cases reported in pediatric patients and a single canine case involving encephalic lymphosarcoma. The hemorrhagic enteritis observed in this patient was suspected to be a complication of the chronic hypernatremic and hyperlipidemic state. This report explores the relevant literature and proposes potential pathophysiological mechanisms underlying the interplay between these clinical findings and altered thirst regulation caused by corpus callosum dysplasia.