Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Rare ligamentum flavum cyst causing incapacitating lumbar spinal stenosis: Experience with 3 Chinese patients | Chan et al. Journal of Orthopaedic Surgery and Research 2010 5 81 http content 5 1 81 JOURNAL OF ORTHOPAEDIC SURGERY AND RESEARCH CASE REPORT Open Access Rare ligamentum flavum cyst causing incapacitating lumbar spinal stenosis Experience with 3 Chinese patients Alexander Pak-Hin Chan Tsz Cheung Wong Koon-Man Sieh Simon Siu-Man Leung Kai-Yin Cheung Kwai-Yau Fung Abstract Three Chinese patients suffered from severe lumbar spinal stenosis with debilitating symptoms due to a rare condition of ligamentum flavum cysts in the midline of the lumbar spine. This disease is distinct from synovial cyst of the facet joints or ganglion cysts both intraoperatively and histopathologically. Magnetic Resonance imaging features of the ligamentum flavum cyst are also demonstrated. We share our surgical experiences of identification of the ligamentum flavum cysts decompression and excision for two of the patients with demonstrably good recovery. This disease should be considered in the differential diagnosis of an extradural instraspinal mass in patients with lumbar spinal stenosis. Background Lumbar spinal stenosis is commonly caused by degenerative conditions such as herniated nucleus propulsus or hypertrophy of facet joint or ligamentum hypertrophy. Less common aetiologies include intraspinal extradural masses including synovial cysts 1 ganglion cysts 2 pseudocysts haematoma metastatic tumour. Cyst originated from ligamentum flavum is even more uncommon. Few reported cases of spinal stenosis and radiculopathy were caused by ligamentum flavum cysts and none of these are from the Chinese population 3-8 . We describe our experiences of Chinese patients suffering from spinal stenosis due to ligamentum flavum cysts. Case Presentation Case 1 A 74-year-old man presented with 1-year history of progressive bilateral leg weakness with left side being more affected. He walked with frame in the most recent 3 months. There was no history of trauma or other constitutional .
