Transforaminal injections are widely used. Serious complications including strokes and paraplegia have been reported after transforaminal injections of corticosteroids, and the Afssaps (2011) has issued a warning about their use [1]. The needle must be positioned in the posterior aspect of foramen, and its correct placement validated by an injection of contrast product. It is preferable to choose cortivazol (Altim(®)) as the corticoid for injection. This procedure is simple, reproducible, and durably effective in 60 to 70% of cases. Complications and adverse effects are rare but potentially serious: allergies, blood pressure surge, vasovagal syncope, transient exacerbation of pain, infection, stroke, and paraplegia. The aim of this course is to stress the need for rigor - in the indication, the technical performance of the procedure, and the overall management of the patient.

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