2012
DOI: 10.1080/08998280.2012.11928791
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Papillary Tumor of the Pineal Region

Abstract: Presented is a patient with papillary tumor of the pineal region (PTPR), an uncommon and recently recognized neoplasm. As its name implies, PTPR does not arise from the pineal gland itself. The cell of origin is thought to be the specialized ependymocytes of the subcommissural organ. Primary tumors of the pineal region include pineal parenchymal neoplasms, germ cell neoplasms, and tumors arising from adjacent structures, including meningiomas, astrocytomas, and ependymomas. Like other masses in this location, … Show more

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Cited by 11 publications
(4 citation statements)
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“…Tumors at the time of diagnosis are quite big, being 5-50 mm in diameter (average 29 mm) and nearly in half of the patients they cause hydrocephalus [14]. In the majority of MR imaging reports of PTPR, the tumor looks like a heterogeneously enhanced pineal region mildly lobulated mass with cystic compartments [3,[15][16][17]. The intrinsic hyperintensity on non-contrast T1-weighed sequences in the absence of fat, hemorrhage, melanin or calcifications is considered to be a characteristic MRI appearance of this tumor [15].…”
Section: Discussionmentioning
confidence: 99%
“…Tumors at the time of diagnosis are quite big, being 5-50 mm in diameter (average 29 mm) and nearly in half of the patients they cause hydrocephalus [14]. In the majority of MR imaging reports of PTPR, the tumor looks like a heterogeneously enhanced pineal region mildly lobulated mass with cystic compartments [3,[15][16][17]. The intrinsic hyperintensity on non-contrast T1-weighed sequences in the absence of fat, hemorrhage, melanin or calcifications is considered to be a characteristic MRI appearance of this tumor [15].…”
Section: Discussionmentioning
confidence: 99%
“…It is important to underline that pineal papillary tumors present wide morphological variability [ 82 , 92 , 93 , 94 , 95 ]. Apart from the characteristic papillary structures, papillary tumors have morphological features in common with other papillary-like tumors that occur in the pineal region, including pineal parenchymal neoplasms, choroid plexus papillomas, papillary ependymomas, metastatic papillary carcinomas, papillary meningiomas, and germ cell tumors, which complicates the clinical diagnosis [ 60 , 83 , 87 , 92 , 96 , 97 ]. These pineal tumors often present increased proliferative activity (Ki67/MIB1 proliferation index) [ 90 ], which is correlated with worse prognosis.…”
Section: Pineal Gland Tumorsmentioning
confidence: 99%
“…In 2007, PTPR was included in the World Health Organization classification of central nervous system tumors ( 2 ). PTPR does not arise from the pineal gland itself, but originates from specialized cytokeratin-positive and nestin-positive ependymal cells that are derived from the subcommissural organ ( 3 5 ). Tumors of the pineal region are rare lesions, accounting for only 1% of all intracranial tumors ( 6 ).…”
Section: Introductionmentioning
confidence: 99%
“…Tumors of the pineal region are rare lesions, accounting for only 1% of all intracranial tumors ( 6 ). PTPR have morphological features in common with a number of other papillary-like tumors that occur in the pineal region, including pineal parenchymal neoplasms, choroid plexus papilloma, papillary ependymoma, metastatic papillary carcinomas, papillary meningioma and germ cell tumors ( 5 , 7 ), which complicates the clinical diagnosis of PTPR. Clinical presentation most often includes headache and obstructive hydrocephalus.…”
Section: Introductionmentioning
confidence: 99%