Multiple epidural lumbar chordomas without bone involvement in a 17-year-old female: a case report.

BACKGROUND CONTEXT: Chordomas are rare slow-growing neoplasms or malignant tumors that arise from embryonic rudiments of the primitive notochord. They account for 1% to 4% of all primary malignant bone tumors. Surgery in addition to radiotherapy is often used as the optimum treatment but with marginal effectiveness as these tumors are relatively radioresistant. To the best of our knowledge, there have been no reported cases of multiple and distinct epidural lesions without bone involvement in the literature. PURPOSE: To describe an unusual case of two separate epidural chordomas occurring in the lumbar spine without bone involvement. STUDY DESIGN: Case report. METHODS: Clinical, radiologic, and histopathologic evaluation of a 17-year-old female with two separate adjacent lumbar epidural chordomas without bone involvement treated with complete surgical excision is discussed. RESULTS: Four years after surgical resection of the tumors, the patient remains asymptomatic, and radiologic results revealed no recurrent lumbar epidural tumor. CONCLUSIONS: Epidural chordomas appear to have a better prognosis due, at least in part, to the ability to more easily completely excise them.

Understanding the role of tumor stem cells in glioblastoma multiforme: a review article.

It has been hypothesized that cancer stem cells (CSC) may account for the pathogenesis underlying various tumors, including GBM. Markers of these CSCs can be potentially used as therapeutic targets. In this review, we discuss the most recent information regarding CSCs, their molecular biology and their potential role in GBM.

Pineal parenchymal tumor of intermediate differentiation with papillary features: a continuum of primary pineal tumors?

Pineal parenchymal tumors comprise a rare group of primary neoplasms of the pineal gland. We describe a case involving a 29-year-old woman who presented with signs and symptoms of hydrocephalus secondary to a pineal region tumor obstructing the third ventricle. Surgical resection was performed and pathological analysis revealed a novel diagnosis consistent with a pineal parenchymal tumor of intermediate differentiation (PPTID) with transition to a papillary tumor of the pineal region (PTPR). To our knowledge, this particular pineal region tumor pathology has not yet been reported in the literature and highlights the continuum with which primary pineal tumors exist. We provide a review of the existing literature on pineal region tumors, specifically PTPR and PPTID, and offer insight into the management of these rare neoplasms.