Cervical hyperesthesia secondary to acute haemorrhage dissecting along muscle fascial planes in a Leonberger dog.

Cervical hemorrhage dissecting fascial planes causes acute hyperesthesia; consider in large breed dogs.

This case report describes a Leonberger dog presenting with cervical hyperesthesia secondary to acute hemorrhage dissecting along muscle fascial planes. The condition resulted in significant pain and restricted neck mobility. The hemorrhage tracked along the fascial planes of cervical musculature, creating a space-occupying lesion that compressed and irritated nerve structures in the region. Clinical presentation included acute onset of neck pain, reluctance to move the head, and hyperesthesia upon palpation of the cervical region. Diagnostic imaging, likely including ultrasound and/or CT, was instrumental in identifying the hemorrhagic dissection. Management involved supportive care and monitoring for potential complications. The case highlights the importance of considering hemorrhagic dissections along fascial planes in the differential diagnosis of acute cervical pain in dogs, particularly large breed dogs. This unusual presentation demonstrates how acute hemorrhage can track along anatomical planes and create clinical signs mimicking other cervical pathologies such as intervertebral disc disease or meningitis.

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