de Strobel Francesca, Taeymans Olivier, Rosati Marco, Cherubini Giunio B
Neurology and Neurosurgery Department, Dick White Veterinary Referrals Centre, Cambridge, UK.
Radiology Department, Dick White Veterinary Referrals Centre, Cambridge, UK.
JFMS Open Rep. 2015 Sep 29;1(2):2055116915604875. doi: 10.1177/2055116915604875. eCollection 2015 Jul-Dec.
A 16-year-old neutered female domestic shorthair cat was referred for chronic history of reluctance to jump, stiffness of the tail and lower back pain. Mild pelvic limb ataxia, reduced perianal reflex and lumbosacral discomfort were present on neurological examination. On magnetic resonance imaging, a well-defined rounded structure of 3 mm in diameter was identified on the right dorsal aspect of the epidural space at L7-S1, causing displacement of the cauda equina. The lesion was hyperintense to spinal cord parenchyma on T2-weighted images and hypointense on T1-weighted images, consistent with a fluid-filled structure. A Lumbosacral dorsal laminectomy was performed. A clear fluid-containing structure was identified between the right L7 nerve root and the cauda equina. Following surgical excision, histopathology confirmed the cystic nature of the lesion and revealed thick disorganised sheaths of fibrocollagenous tissue and flattened mesenchymal cells lining the luminal part of the cyst wall. A diagnosis of intraspinal ganglion cyst was made. The cat recovered uneventfully. Seven months after surgery euthanasia was performed for unrelated reasons; no neurological deficits were present.
This is the first reported case of intraspinal ganglion cyst in a cat. Intraspinal extradural cysts should be considered among other differential diagnoses for cats with lumbosacral myelopathy/radiculopathy.
一只16岁已绝育的雌性家养短毛猫因长期不愿跳跃、尾巴僵硬和下背部疼痛被转诊。神经学检查发现轻度盆腔肢体共济失调、肛周反射减弱和腰骶部不适。磁共振成像显示，在L7-S1水平硬膜外间隙右侧背侧有一个直径3mm的边界清晰的圆形结构，导致马尾神经移位。在T2加权图像上，该病变相对于脊髓实质呈高信号，在T1加权图像上呈低信号，与充满液体的结构一致。进行了腰骶部背侧椎板切除术。在右侧L7神经根和马尾神经之间发现了一个含有清亮液体的结构。手术切除后，组织病理学证实了病变的囊性性质，并显示纤维胶原组织鞘增厚且紊乱，囊肿壁腔面衬有扁平的间充质细胞。诊断为脊髓内神经节囊肿。这只猫恢复顺利。术后七个月，因无关原因实施了安乐死；未出现神经功能缺损。
这是首例报道的猫脊髓内神经节囊肿病例。对于患有腰骶部脊髓病/神经根病的猫，脊髓硬膜外囊肿应被列入其他鉴别诊断之中。
