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 CASE REPORT
Year : 2018  |  Volume : 66  |  Issue : 3  |  Page : 763--766

Melanotic intracranial epidermoid: Case report and description of a new subtype


1 Department of Neurosurgery, Gleneagles Global Health City, Institute of Neurosciences and Spinal Disorders, Chennai, Tamil Nadu, India
2 Department of Pathology, Gleneagles Global Health City, Institute of Neurosciences and Spinal Disorders, Chennai, Tamil Nadu, India

Correspondence Address:
Dr. Krishnamurthy Sridhar
Department of Neurosurgery, Institute of Neurosciences and Spinal Disorders, Gleneagles Global Health City, 439, Cheran Nagar, Perumbakkam, Chennai - 600 100, Tamil Nadu
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0028-3886.232336

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Intracranial epidermoids are generally seen as hypodense nonenhancing lesions on computed tomography scans; and, as T1 hypointense and T2 hyperintense lesions on magnetic resonance imaging (MRI). Unusual radiological findings have been reported earlier. The authors present the case of a 54-year old male patient who had prior intracranial surgery. On MRI, there was a thick peripheral mantle of diffusion restriction with a central core of brilliant T1 hyperintensity and very black T2 hypointensity. The peripheral mantle showing diffusion restriction was heterogeneously T1 hypointense and T2 hyperintense. At surgery, there was a typical pearly white epidermoid peripherally with a greenish-brown centre. Pathology showed abundant extracellular melanin which was also found in the basal layer. The authors present the first case of a melanin pigmented intracranial epidermoid in literature, describing a new histological subtype.






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