Histopathologic and immunohistochemical profile of spinal glioblastoma: a study of six cases

Spinal intramedullary glioblastomas are uncommon tumors and are known to have a very poor prognosis. Only a few studies in the literature have described their histopathological characteristics. We describe the detailed histopathological and immunohistochemical profiles of six cases of spinal gliobla...

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Bibliographic Details
Published in:	Brain tumor pathology 2011-10, Vol.28 (4), p.297-303
Main Authors:	Govindan, Aparna, Chakraborti, Shrijeet, Mahadevan, Anita, Chickabasavaiah, Yasha T., Santosh, Vani, Shankar, S. K.
Format:	Article
Language:	eng
Subjects:	Adolescent Adult Aged Angiogenesis Antigens Brain cancer Cancer Research Female Glial Fibrillary Acidic Protein - metabolism Glioblastoma - metabolism Glioblastoma - pathology Humans Immunohistochemistry Labeling Magnetic resonance imaging Male Medical imaging Medicine Medicine & Public Health Middle Aged Neuroimaging Neurology Neurosurgery Oncology Original Article Pathology Spinal cord Spinal Cord Neoplasms - metabolism Spinal Cord Neoplasms - pathology Tumor Suppressor Protein p53 - metabolism Tumors Urinary incontinence
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Summary:	Spinal intramedullary glioblastomas are uncommon tumors and are known to have a very poor prognosis. Only a few studies in the literature have described their histopathological characteristics. We describe the detailed histopathological and immunohistochemical profiles of six cases of spinal glioblastoma. Most of the tumors were located in the cervical or cervicothoracic region. The majority of the patients were young adults (mean age 34.8 years), presenting with a short duration of symptoms of 2 months or less. Their histopathological features were similar to cerebral glioblastoma. Diverse vascular changes like microvascular proliferation, sprouting angiogenesis, sclerosed and thrombosed vessels, along with field necrosis were prominent findings. All tumors were positive for GFAP and negative for EMA. The MIB-1 labeling index was very high (mean 16.7 ± 3.2%). Five out of six tumors were immunoreactive for p53 protein, and only two showed over-expression of EGFR protein. The predominant expression of p53 in these young patients suggests that spinal glioblastomas are similar to secondary glioblastoma in the cerebral hemispheres, despite the short duration of symptoms in them and vascular changes that are similar to those noted in primary glioblastoma. These observations support the fact that spinal glioblastomas are heterogeneous tumors underlined by complex molecular pathways. Nevertheless, inactivation of the p53 tumor suppressor pathway could play a major role in the genesis of these neoplasms.
ISSN:	1433-7398 1861-387X