myelogram

A myelogram is a diagnostic imaging procedure used to examine the spinal cord and the spaces surrounding it, known as the subarachnoid space. It involves the injection of a contrast dye into the cerebrospinal fluid within the subarachnoid space, typically in the lower back. This contrast material then travels through the spinal canal, coating the spinal cord and nerve roots. Once the dye is introduced, a series of X-ray images or other imaging techniques such as CT scans are taken. These images allow radiologists to visualize any abnormalities or blockages that may be affecting the spinal cord.

Myelography is often performed when other imaging methods, like MRI or CT scans without contrast, have not provided a clear diagnosis or are contraindicated. It is particularly useful in identifying conditions such as herniated discs, spinal stenosis, tumors, nerve root compression, or injuries to the spinal cord. The procedure is usually done under local anesthesia, and a small amount of cerebrospinal fluid may be removed before the contrast dye is injected. After the procedure, patients are often advised to rest for a period to allow the cerebrospinal fluid to replenish and to minimize the risk of headaches, a common side effect.