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Radiology News


Atypical teratoid/rhabdoid tumors-MR

Primary atypical teratoid/rhabdoid tumors (AT/RTs) are rare malignant intracranial neoplasms, usually occurring in young children. They were termed "AT/RT" because they contain nests or sheets of rhabdoid tumor cells as well as varying proportions of primitive neuroectodermal tumor (PNET) cells, mesenchymal spindle-shaped tumor cells, and/or epithelial-type tumor cells. As reported in the literature this patient had MR imaging signal-intensity characteristics  as nonhomogeneous, secondary to the heterogeneous cellular populations in these tumors as well as the frequent presence of necrosis, hemorrhage, and/or calcifications.

Atypical teratoid/rhabdoid tumors-MR Reviewed by Sumer Sethi on Friday, February 11, 2011 Rating: 5

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