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Multifocal ischaemic encephalomyelopathy associated with fibrocartilaginous emboli in the lamb
Abstract:
Multifocal, arterial, fibrocartilaginous embolism of the cervical spinal cord, medulla oblongata and cerebellum is described in a neonatal lamb. The emboli contained mucosubstances which, by the Alcian blue critical electrolyte concentration method, were identified as mainly keratan sulphate. This composition indicates the probable origin of emboli from the nucleus pulposus of intervertebral discs. Possible modes of entry of such material into the spinal cord vasculature are reviewed and a mechanism proposed to explain the localization of emboli in spinal cord, brain stem and cerebellar arteries in this case.
Insights
Fibrocartilaginous emboli, rich in keratan sulfate from intervertebral discs, caused multifocal arterial blockages in a neonatal lamb's spinal cord and brain. This study investigates their origin and vascular entry.
Area of Science:
- Veterinary Pathology
- Neuropathology
- Comparative Medicine
Background:
- Fibrocartilaginous embolism is a rare but significant cause of vascular occlusion.
- Understanding the origin and composition of emboli is crucial for diagnosing and managing such conditions.
- Neonatal animal models offer insights into naturally occurring pathologies.
Observation:
- A neonatal lamb presented with multifocal arterial fibrocartilaginous emboli affecting the cervical spinal cord, medulla oblongata, and cerebellum.
- Histopathological analysis revealed emboli composed primarily of mucosubstances identified as keratan sulfate.
- The emboli were localized within the arterial supply to the spinal cord, brainstem, and cerebellum.
Findings:
- The composition of the emboli, predominantly keratan sulfate, strongly suggests an origin from the nucleus pulposus of intervertebral discs.
- The study reviews potential pathways for fibrocartilaginous material to enter the spinal cord vasculature.
- A specific mechanism is proposed to explain the observed arterial localization in the central nervous system.
Implications:
- This case highlights a potential mechanism for fibrocartilaginous embolism in neonatal animals, possibly linked to intervertebral disc material.
- The findings contribute to the understanding of vascular pathologies in the central nervous system of young animals.
- Further research could explore the incidence and clinical significance of such events in veterinary neurology.
