Myelography In Diagnosis Research Articles

Relevance of Myelography in Diagnosis of Subarachnoid Hematoma in a Rottweiler with Traumatic Cervical Subluxation – Case Report

Traumatic luxation or subluxation of the cervical vertebrae can cause unstable spinal injuries, such trauma has the potential to disrupt the subarachnoid blood vessel and produce hematoma that will compress the spinal cord. Being located in the soft tissue of the marrow that hematoma will be impossible to examine through conventional radiography. A 1 year, Rottweiler dog was brought for radiography examination presenting neck pain and tetra paresis. Radiographic exposures were done in lateral and dorso-ventral recumbency to examine the cervical vertebrae. Cervical myelography was done using contrast agent Optiray 350 (Ioversol, manufactured by Mallinckrodt Pharmaceuticals), 0,5 ml/kg. The contrast agent was injected in the cervical area in occipito-athloidian space. Conventional radiography shows a normal aspect of the cervical vertebrae without any sign of fractures. It was observed a narrowing of the space between occipital and atlas. Puncture of the cervical area of the spine show no cerebrospinal fluid. Injection of the contrast agent was done easily. Myelography was performed at intervals of 2 minutes. Myelography revealed a filling defect in the dorsal part of the marrow caudally of the atlas that corresponded to a hematoma. Myelography is useful in determining the filling defects due to blood clot formation on the marrow after a posttraumatic event. Â

Case Series: Long segment extra-arachnoid fluid collections: Role of dynamic CT myelography in diagnosis and treatment planning

We report five patients in whom spinal MRI revealed extra-arachnoid fluid collections. These spinal fluid collections most likely resulted from accumulation of cerebrospinal fluid (CSF) from a dural leak. The patients presented with either compressive myelopathy due to the cyst or superficial siderosis (SS). All of these fluid collections were long segment, and MRI demonstrated the fluid collections but not the exact site of leak. Dynamic CT myelogram demonstrated the site of leak and helped in the management of these complicated cases. Moreover, we also found that the epicenter of the fluid collection on MRI was different from the location of the leak on a dynamic CT myelogram. Knowledge of these associations can be helpful when selecting the imaging studies to facilitate diagnosis and treatment.

Ossification of the Thoracic Ligamentum Flavum presenting with Intercostal Neuralgia

A 46-year-old female was admitted complaining of progressive, severe girdle pain consistent with the left Th3 dermatome. Neurological examination on admission revealed dysesthesia and radiating pain in the left Th3 territory. Plain X-rays and tomograms of the thoracic spine revealed a beak-like bony excrescence arising from the lamina and projecting moderately to the Th3/4 intervertebral foramen, suggesting ossification of the thoracic ligamentum flavum (OYL). Myelography showed the dural sac compressed from laterally just below the left Th3 pedicle, which suggested that the Th3 nerve root was compressed by the OYL. After Th3 nerve root decompression through hemilaminectomy and foraminotomy, the girdle pain disappeared. OYL is known to cause thoracic radiculomyelopathy, but presentation with intercostal neuralgia only is very rare. The authors review the literature and stress the importance of myelography for diagnosis.

Evaluation of the dermatomal somatosensory evoked potential in the diagnosis of lumbo-sacral root compression.

The dermatomal somatosensory evoked potential from the lumbo-sacral dermatomes was recorded from 21 patients with radiographically and surgically (20) proven lumbo-sacral root compression due to prolapsed intervertebral disc or canal stenosis. The potential was abnormal in 19 of the 20 surgically proven cases. The dermatomal somatosensory evoked potential is as accurate as myelography for diagnosis but has the advantage of being non-invasive and repeatable. It provides useful additional diagnostic and pathophysiological information about lumbo-sacral root compression.

Evaluation of Myelography in Diagnosis of Lumbar Intervertebral Disc Lesion

Evaluation of Myelography in Diagnosis of Lumbar Intervertebral Disc Lesion