IntroductionVertebral hemangioma is a common, benign, isolated lesion [10] that is usually discovered fortuitously on radiographs taken for another reason. Some patients, however, have chronic back pain and/or neurologic symptoms due to spinal cord or nerve root compromise. Spinal cord compromise is usually due to slowly progressive compression secondary to concentric narrowing of the spinal canal [19]. Although plain radiographs can show suggestive changes in a vertebral body, consisting of coarse trabeculae arranged in a honeycomb configuration, MRI is required in most cases and allows evaluation of the degree of vertebral canal stenosis [9]. A vertebral hemangioma can produce acute spinal cord compression during the last 3 months of pregnancy [1, 2,17,27] or after a trivial trauma [12]. To avoid missing the diagnosis, investigations should be selected rationally, especially as the neurologic lesions sometimes require emergency surgical treatment. Other problems include selection of the best release method, determination of the role and extent of fixation, and evaluation of the need for complementary vertebroplasty. We illustrate these problems with two reports of patients who required emergency surgery for acute spinal cord compression.
Case reportsCase 1A 27-year-old woman was 7 months pregnant when she sought medical advice for recent onset of rapidly worsening weakness in both legs responsible for difficulty in walking. Her medical history was unremarkable, and she denied any precipitating event.The physical examination disclosed a pyramidal syndrome in both lower limbs, with muscle weakness reflected by a muscle strength grade of 3, and sensory loss up to the umbilicus, indicating spinal cord compression at the level of T10.Plain radiographs disclosed a corduroy appearance of T8 with no vertebral collapse or pedicular lysis.An MRI study was done on an emergency basis to evaluate this picture of acute spinal cord compression. Changes typical of intraspinal bleeding from a hemangioma of T8 were seen. The body, pedicles, and neural arch of T8 were manifest as low signal on T1-weighted images and high signal on T2-weighted images, consistent with a type 1 vertebral hemangioma, the most frequent type in the classification developed by the French Society for Neurosurgery [19].After a cesarean section, decompression of the spinal cord was achieved by laminectomy of T7 and T8, which was performed without prior embolization. Internal fixation was then performed from T6 to T10 using Domino Howmedica plates screwed into the pedicles.Motor function and touch sensation promptly returned to normal, whereas nociception and deep sensation remained partially impaired.Abstract Vertebral hemangiomas can cause acute spinal cord compression either after a minor trauma or during the last 3 months of pregnancy. Failure to recognize the lesion can lead to potentially serious treatment delays. An emergency MRI scan usually establishes the diagnosis of vertebral hemangioma responsible for spinal cord compression requiring laminect...