Ossification of the posterior longitudinal ligament (OPLL), ossification of the anterior longitudinal ligament (OALL), and ossification of the ligamentum flavum (OLF) sometimes are seen in the same patients, but the exact coexisting frequencies are not clear especially in the cervical region. What is your diagnosis now? 16,17 Ossification of the posterior longitudinal ligament has been identified as a cause of cervical myelopathy. Ossification of the posterior longitudinal ligament (OPLL) refers to a condition in which bone forms within the posterior longitudinal ligament. Thus, patients with OPLL and SCI tend to be older and have ossification of the anterior longitudinal ligament. The facet joints are not fused (long arrow). Ossification of the posterior longitudinal ligament, also referred to as OPLL, is a spinal condition where the posterior longitudinal ligament becomes calcified and less flexible. Introduction. Forestier's disease, also known as diffuse idiopathic skeletal hyperostosis (DISH), is an idiopathic rheumatological abnormality in which exuberant ossification occurs along ligaments throughout the body, but most notably the anterior longitudinal ligament of the spine. The normal pattern of arrangement of vertebrae in the humanspine confers springiness, flexibility, and strength to the vertebralcolumn; this is possible because of the various ligaments and jointsbinding the vertebra together. It has been estimated that nearly 25% of patients with cervical myelopathy will have features of OPLL. Thus ossification of the longitudinal ligaments is believed to cause the vertebral rigidity which is typical of rhizomelic spondylosis (Strümpell-Marie disease of the American, or Bechterew disease 2 of the German, nomenclature). Ossification of the posterior longitudinal ligament of the spine (OPLL) is a condition that is characterized by the calcification of the soft tissues that connect the bones of the spine, which may lead to compression of the spinal cord.Many affected people do not have any signs or symptoms, while others may experience mild pain or numbness in the arms and/or legs. Thoracic myelopathy caused by ossification of the posterior longitudinal ligament (OPLL) remains one of the most difficult-to-treat disorders for spine surgeons. ... - Ossification Posterior Longitudinal Ligament E 8/30/2011 172 . Ossification of the anterior longitudinal ligament (OALL), also called Forestier’s disease or diffuse idiopathic skeletal hyperostosis (DISH), is a non-inflammatory disease characterized by the presence of anterior bridging osteophytes of unknown etiology. of Ossification in Patients with Cervical Ossification of the Posterior Longitudinal Ligament: A Prospective Multi‐Institutional Cross‐Sectional Study Takashi Hirai 1,2,*, Toshitaka Yoshii 1,2, Shuta Ushio 1,2, Jun Hashimoto 1,2, Kanji Mori 2,3, In Japan, approximately 75% of patients with this condition are treated using posterior decompression with … Kensei Nagata and Kimiaki Sato. It is located on the front side of the vertebral bodies. Background: Ossification of the posterior longitudinal ligament is commonly associated with cervical myelopathy. When the posterior longitudinal ligament becomes thicker and less flexible, ossification of the posterior longitudinal ligament occurs. Symptoms of Ossification of the posterior longitudinal ligament of the spine including 8 medical symptoms and signs of Ossification of the posterior longitudinal ligament of the spine, alternative diagnoses, misdiagnosis, and correct diagnosis for Ossification of the posterior longitudinal ligament of the spine signs or Ossification of the posterior longitudinal ligament of the spine symptoms. Ossification of the posterior longitudinal ligament (OPLL) is a condition in which there is pathologic ossification of this ligament in the cervical and/or thoracic spine. Hyperplasia of the fibrocartilaginous tissue may occur in the posterior aspect of the intervertebral disc, extending into the ossified posterior longitudinal ligament. Thoracic myelopathy caused by ossification of the posterior longitudinal ligament (OPLL) remains one of the most difficult-to-treat disorders for spine surgeons. Surgical treatment is a matter of controversy. 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