Diagnosis, Classifications and Treatment of Os Odontoideum: WFNS Spine Committee Recommendations.

Study Design: A systematic literature review and consensus using Delphi method.

Objective: The aim was to formulate consensus recommendations regarding the natural history, diagnosis, classification and optimal treatment of Os Odontoideum with global applicability.

Summary Of Background: Os odontoideum (OO) is a rare anomaly of the cranio-vertebral junction (CVJ).

Misdiagnosed spontaneous intracranial hypotension complicated by subdural hematoma following lumbar puncture.

Introduction: Spontaneous intracranial hypotension is an infrequent cause of secondary headache due to cerebrospinal fluid (CSF) hypovolemia.

Objective: To describe a case of headache revealing spontaneous intracranial hypotension complicated by subdural hematoma following lumbar puncture.

Observation: A 34-year-old man presented with acute postural headache.

Primary liposarcoma of the lumbar spine.

Background: We describe a rare case of the cauda equina syndrome caused by a primary pleomorphic liposarcoma of the lumbar spine.

Case Report: A 35-year-old man presented a 2-month history of back pain and slowly progressive weakness of lower limbs without sphincter dysfunction. It had a laminectomy for a supposed disc herniation three years previously.