Abstract
A 7-month-old male mongrel dog showed induration and pain in the both distal ear lobes in winter. The both distal pinnae were surgically removed and histopathology revealed embolism in the necrotized ear lesions. The patient blood plasma was tested for cold agglutinin and showed partial precipitation at 4°C and disappearance at 37°C. The case was diagnosed as cryofibrinogenemia, and without exposing to cold, the dog was being in favorable condition for one year after operation.
