Necrotizing lymphadenitis as a cause of acute abdominal distress in a dog.

An unusual case of acute abdominal distress caused by necrotizing lymphadenitis of the retroperitoneal lymph nodes in a 10-year-old Springer Spaniel is presented. The retroperitoneal lymph nodes were severely distended, but no other abnormalities were found in the abdominal cavity or elsewhere. Biopsy revealed acute necrotizing lymphadenitis, which should be considered in the differential diagnosis of acute abdominal disorders in the dog.