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  • rare tumor
  • Pigmented neuroepithelial tumor is a rare tumor. (blogspot.com)
  • This rare tumor should be suspected when T1-weighted images show signal hyperintensity and T2-weighted images show signal iso- or hypointensity, with mild contrast enhancement of the lesion. (ajnr.org)
  • neural
  • Someauthors proved that this tumor causes a high urinaryexcretion of vanillylmandelic acid (VMA), suggestinga neural crest origin. (blogspot.com)
  • Neural tumors, such as neurofibromas, are related to melanocytic tumors because both are of neuroectodermal origin. (doctorlib.info)
  • It is generally accepted that in embryogenesis, the Schwann cells are derived from the neural crest and are of neuroectodermal origin. (medscape.com)
  • 76 Ganglioneuroma is a rare and benign tumor of the autonomic nerve fibers arising from neural crest. (malacards.org)
  • An important gene associated with Bednar Tumor is PDGFB (Platelet Derived Growth Factor Subunit B), and among its related pathways/superpathways are Embryonic and Induced Pluripotent Stem Cell Differentiation Pathways and Lineage-specific Markers and Neural Stem Cell Differentiation Pathways and Lineage-specific Markers . (malacards.org)
  • schwannomas
  • Immunohistochemical and ultrastructural comparative study of external lamina structure in 31 cases of cellular, classical, and melanotic schwannomas. (thefreedictionary.com)
  • Other malignant tumor types are oligodendrogliomas and acoustic neuromas (Schwannomas). (thefreedictionary.com)
  • Melanotic schwannomas, on the other hand, comprise a rare variant of schwannomas composed of melanin-producing cells having the ultrastructural and immunophenotypical features of Schwann cells (16). (upmc.edu)
  • location of the tumor
  • Children with posterior fossa brain tumors typically present with signs and symptoms related to increased intracranial pressure, gait disturbances, and/or cranial nerve deficits, depending upon the type, size, and location of the tumor. (jaocr.org)
  • Treatment varies based on the severity of the condition, the location of the tumor and the overall health of the affected person. (malacards.org)
  • bednar tumor
  • Bednar tumor is also known as pigmented DFSP because it contains dark-colored cells that give may give the tumor a multi-colored (i.e red and brown) appearance. (malacards.org)
  • The underlying cause of Bednar tumor is unknown. (malacards.org)
  • Bednar Tumor, also known as pigmented dermatofibrosarcoma protuberans , is related to dermatofibrosarcoma protuberans and ring chromosome 4 . (malacards.org)
  • lesions
  • Blue nevi and other melanotic lesions of the prostate: report of 3 cases and review of the literature. (thefreedictionary.com)
  • Central nervous system changes occur as the lesions invade and destroy tissue, and, because the tumors compress the brain, cranial nerves, and cerebral blood vessels, the compression causes cerebral edema and increased intracranial pressure (ICP). (thefreedictionary.com)