A 6‐month‐old Standardbred weanling presented with acute non‐ambulatory tetraparesis. Cranial nerve examination was normal and neuroanatomic localisation suggested there was a focal C1‐C5 spinal cord lesion. Post‐mortem examination identified a cervical vertebral epidural haematoma at the level of C2‐C3 causing spinal cord compression and neurological deficits. Histological examination determined the haematoma was several weeks old making the lesion chronic. Since the clinical progression was acute, this suggests an acute on chronic pathophysiology. Even with no history of trauma, an epidural haematoma should be on the differential list in young horses with acute tetraparesis.

中文翻译：

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颈椎硬膜外血肿引起的6个月大标准断奶的急性非卧床四肢轻瘫

6个月大的标准品种断奶，表现为急性非活动性轻瘫。颅神经检查正常，神经解剖定位提示局灶性C1-C5脊髓病变。死后检查发现颈椎硬膜外血肿处于C2-C3水平，引起脊髓压迫和神经功能缺损。组织学检查确定血肿是几周大，使病变为慢性。由于临床进展是急性的，因此提示慢性病理生理学是急性的。即使没有外伤史，硬膜外血肿也应在患有急性四肢瘫痪的幼马中列在鉴别清单上。