Schmökel Hugo, Rapp Martin
Hugo Schmökel, Evidensia Spine Center, Specialistdjursjukhuset, Djursjukhusvägen 11, 73494 Strömsholm, Sweden, E-mail:
Vet Comp Orthop Traumatol. 2016;29(1):83-8. doi: 10.3415/VCOT-15-04-0060. Epub 2015 Oct 29.
Three German Shepherd Dogs that were presented for investigation of chronic unilateral hindlimb lameness and pain in the lumbosacral region were diagnosed with an intraspinal, extradural synovial cyst and reactive fibrosis protruding into the foramen of the lumbosacral articulation using magnetic resonance imaging and histology. This extradural mass compressed the nerve root in the foramen and the cauda equina. During a dorsal laminectomy and unilateral partial foraminotomy, the cyst and the fibrotic tissue were removed with the aid of a 2.4 mm 30° arthroscope for visualization of the foramen. The fibrotic tissue surrounding the cysts was in all cases confluent with the annulus of the intervertebral disc. The histological examination confirmed the diagnosis of a synovial cyst in all three cases by finding inflamed synovial membrane in the samples from the wall of the cyst as well as reactive fibrosis and cartilaginous metaplasia in the surrounding tissue. The three patients improved after the surgery and were pain free during the follow-up evaluations.
三只德国牧羊犬因慢性单侧后肢跛行及腰骶部疼痛前来检查，经磁共振成像和组织学检查，诊断为椎管内硬膜外滑膜囊肿及反应性纤维化，囊肿及纤维化组织突入腰骶关节孔，压迫孔内神经根及马尾。在进行背侧椎板切除术和单侧部分椎间孔切开术时，借助2.4毫米30°关节镜观察椎间孔，切除囊肿及纤维化组织。所有病例中，囊肿周围的纤维化组织均与椎间盘纤维环相连。组织学检查在囊肿壁样本中发现炎症滑膜，周围组织有反应性纤维化和软骨化生，确诊三例均为滑膜囊肿。三名患者术后病情改善，随访评估期间无疼痛。
