Prevalence and Incidence of Spinal Cord Tumor

Spinal Cord Tumor Prevalence: Book Excerpts

• Causes and incidence - Scoliosis
• Causes and incidence - Malignant spinal neoplasms

Prevalence/Incidence of Spinal Cord Tumor: Online Medical Books

16 MEDICAL BOOKS ONLINE! Review excerpts from medical books online, free, without registration, for more information about the prevalence and/or incidence of Spinal Cord Tumor.

Scoliosis: Causes and incidence
(Professional Guide to Diseases (Eighth Edition))

Scoliosis may be functional, structural, or idiopathic. Functional (postural) scoliosis usually results from a discrepancy in leg lengths rather than from a fixed deformity of the spinal column; it corrects when the patient bends toward the convex side. Structural scoliosis results from a deformity of the vertebral bodies, and it doesn’t correct when the patient bends to the side. Structural scoliosis may be:

❑ congenital: usually related to a congenital defect, such as wedge vertebrae, fused ribs or vertebrae, or hemivertebrae; may result from trauma to zygote or embryo

❑ paralytic or musculoskeletal: develops several months after asymmetrical paralysis of the trunk muscles due to polio, cerebral palsy, or muscular dystrophy

❑ idiopathic (the most common form): may be transmitted as an autosomal dominant or multifactorial trait. This form appears in a previously straight spine during the growing years. Brain stem dysfunction, possibly due to a lesion of the posterior columns or the inner ear, may be the cause.

Idiopathic scoliosis can be classified as infantile, which affects mostly male infants between birth and age 3 and causes left thoracic and right lumbar curves; juvenile, which affects both sexes between ages 4 and 10 and causes varying types of curvature; or adolescent, which generally affects girls between age 10 and achievement of skeletal maturity and causes varying types of curvature.

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Source: Professional Guide to Diseases (Eighth Edition), 2005

Malignant spinal neoplasms: Causes and incidence
(Professional Guide to Diseases (Eighth Edition))

Primary tumors of the spinal cord may be extramedullary (occurring outside the spinal cord) or intramedullary (occurring within the cord itself). Extramedullary tumors may be intradural (meningiomas and schwannomas), which account for 60% of all primary malignant spinal cord neoplasms, or extradural (metastatic tumors from breasts, lungs, prostate, leukemia, or lymphomas), which account for 25% of these malignant neoplasms.

Intramedullary tumors, or gliomas (astrocytomas or ependymomas), are comparatively rare, accounting for only about 10%. In children, they're low-grade astrocytomas.

Spinal cord tumors are rare compared with intracranial tumors (ratio of 1:4). They occur equally in men and women, with the exception of meningiomas, which occur mostly in women. Spinal cord tumors can occur anywhere along the length of the cord or its roots.

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Source: Professional Guide to Diseases (Eighth Edition), 2005

About prevalence and incidence statistics:

The term 'prevalence' of Spinal Cord Tumor usually refers to the estimated population of people who are managing Spinal Cord Tumor at any given time. The term 'incidence' of Spinal Cord Tumor refers to the annual diagnosis rate, or the number of new cases of Spinal Cord Tumor diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

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