نتایج جستجو برای: clear cell ependymoma
تعداد نتایج: 1844055 فیلتر نتایج به سال:
Our intracranial implantation mouse model of ependymoma clearly demonstrates overexpression of the ephrin receptor EphB2 in Ink4a/Arf((-/-)) supratentorial embryonic neural stem cells (STeNSCs) to be essential for transformation and disease development; however the requirement for and consequence of receptor activation on transformation and neural stem cell function were not examined. We defini...
Signet-ring cell ependymoma is a rare variant of ependymoma with only seven cases described in literature. Biological behavior and prognosis of this entity are not well-known until now. We present a case of a 49-year-old female with a history of headache and gait instability. Magnetic resonance imaging showed an upper cervical tumor with cystic component and mural nodule. The patient underwent ...
Tanycytic ependymoma is a rare form of ependymoma that usually arises in the intramedullary spine. It has a unique histology emphasized by the inconspicuous ependymal pattern of cells and close resemblance to schwannoma and astrocytoma. The authors report a 50-year-old man with a cervical tanycytic ependymoma that was initially thought to be a schwannoma. The frozen histology section showed spi...
خلاصه: سابقه: کارسینوم ادنتوژنیک با سلول روشن( CCOC ) یک تومورادنتوژنیک نادر و مهاجم است که بیشتر در فک پایین ودهه سنی5 تا 7 دیده می شود. این ضایعه بیشتردر زنان گزارش شده و توانایی عود مکرر، متاستاز منطقه ای و دوردست را دارد. تشخیص این ضایعه امری چالش برانگیز بوده و با توجه به تعداد کم گزارش شده از این ضایعه در دنیا، شناسایی ابعاد بالینی، رادیولوژیک، میکروسکوپی و پیش آگهی این ضایعه حائز اهمیت...
An exceptional case of a recurrent intracranial ependymoma of myxopapillary type arising from the lateral ventricle is reported in a 37-year-old man. This distinctive morphological variant of ependymoma is virtually restricted to the region of cauda equina and filum terminale or occasionally to pre- or post-sacral soft tissue. The intracranial cases of myxopapillary ependymoma are extremely rar...
Here, we present a case of anaplastic giant cell ependymoma (GCE) occurring in a 15-year-old woman. Squash smear slides for intraoperative frozen section diagnosis revealed oval to round cell clusters with a papillary structure in a fibrillary background. This was occasionally accompanied by the presence of bizarre pleomorphic giant cells with hyperchromatic nuclei and prominent intranuclear in...
A father and son presented ten years apart with a fourth ventricle ependymoma. The history, imaging and pathology are presented and the aetiology of familial ependymoma discussed.
multiple primary tumors in a single patient are relatively rare when four or more distinct lesions are considered. herein, we report a case of woman with four different primary tumors: meningioma, renal angiomyolipoma, spinal ependymoma and high-grade soft tissue sarcoma. there was no family history and hereditary syndrome. the genetic analysis was completely normal. to best of our knowledge, t...
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