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Magnetic resonance imaging of pineal region tumours.

Fang AS, Meyers SP - Insights Imaging (2013)

Bottom Line: Pineal lesions include germ cell tumours, neoplasms arising from the pineal parenchyma, as well as other pineal region masses.A variety of cases of pineal lesions are presented.Knowledge of the imaging characteristics and clinical features of varying pineal lesions can assist in narrowing the differential diagnosis for more accurate and rational therapeutic planning. • Pineal parenchymal tumours show an "explosion" of normal pineal calcifications towards the periphery. • Pineoblastomas often have restricted diffusion, with apparent diffusion coefficient (ADC) values lower than germinomas. • Pineal teratomas and pineal lipomas display fat signal characteristics and fat saturation on MRI. • Pineal lesions in patients with known malignancy should raise suspicion of metastatic involvement. • Pineal cysts and arachnoid cysts show MRI signal characteristics similar to cerebrospinal fluid (CSF).

View Article: PubMed Central - PubMed

Affiliation: Department of Imaging Sciences, University of Rochester Medical Center School of Medicine and Dentistry, 601 Elmwood Ave, Box 648, Rochester, NY, 14642, USA, adam_fang@urmc.rochester.edu.

ABSTRACT

Objectives: Pineal lesions can present as a heterogeneous collection of benign and malignant disease conditions. Pineal lesions include germ cell tumours, neoplasms arising from the pineal parenchyma, as well as other pineal region masses.

Methods: A variety of cases of pineal lesions are presented. The important clinical features and typical imaging findings of each pineal lesion are described with emphasis on their morphological appearance and signal intensity characteristics on magnetic resonance imaging (MRI).

Conclusion: Knowledge of the imaging characteristics and clinical features of varying pineal lesions can assist in narrowing the differential diagnosis for more accurate and rational therapeutic planning.

Teaching points: • Pineal parenchymal tumours show an "explosion" of normal pineal calcifications towards the periphery. • Pineoblastomas often have restricted diffusion, with apparent diffusion coefficient (ADC) values lower than germinomas. • Pineal teratomas and pineal lipomas display fat signal characteristics and fat saturation on MRI. • Pineal lesions in patients with known malignancy should raise suspicion of metastatic involvement. • Pineal cysts and arachnoid cysts show MRI signal characteristics similar to cerebrospinal fluid (CSF).

No MeSH data available.


Related in: MedlinePlus

Tentorial meningioma in a 45-year-old woman with papilloedema. A meningioma (arrow) is seen involving the tentorium which extends into the pineal recess. The lesion is isointense to grey matter on axial T2-weighted image (a) and sagittal T1-weighted image (b) and shows prominent contrast enhancement on coronal T1-weighted image (c)
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Fig12: Tentorial meningioma in a 45-year-old woman with papilloedema. A meningioma (arrow) is seen involving the tentorium which extends into the pineal recess. The lesion is isointense to grey matter on axial T2-weighted image (a) and sagittal T1-weighted image (b) and shows prominent contrast enhancement on coronal T1-weighted image (c)

Mentions: Meningiomas characteristically are highly cellular in nature and calcifications are present within the lesion in 15–20 % of cases. Meningiomas are dural-based lesions, which exhibit a dural tail. They demonstrate low to intermediate signal on T1-weighted images and intermediate to slightly-high signal on T2-weighted images (Fig. 12). On post-contrast images, there is typically avid enhancement of the lesion (Fig. 12).Fig. 12


Magnetic resonance imaging of pineal region tumours.

Fang AS, Meyers SP - Insights Imaging (2013)

Tentorial meningioma in a 45-year-old woman with papilloedema. A meningioma (arrow) is seen involving the tentorium which extends into the pineal recess. The lesion is isointense to grey matter on axial T2-weighted image (a) and sagittal T1-weighted image (b) and shows prominent contrast enhancement on coronal T1-weighted image (c)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC3675249&req=5

Fig12: Tentorial meningioma in a 45-year-old woman with papilloedema. A meningioma (arrow) is seen involving the tentorium which extends into the pineal recess. The lesion is isointense to grey matter on axial T2-weighted image (a) and sagittal T1-weighted image (b) and shows prominent contrast enhancement on coronal T1-weighted image (c)
Mentions: Meningiomas characteristically are highly cellular in nature and calcifications are present within the lesion in 15–20 % of cases. Meningiomas are dural-based lesions, which exhibit a dural tail. They demonstrate low to intermediate signal on T1-weighted images and intermediate to slightly-high signal on T2-weighted images (Fig. 12). On post-contrast images, there is typically avid enhancement of the lesion (Fig. 12).Fig. 12

Bottom Line: Pineal lesions include germ cell tumours, neoplasms arising from the pineal parenchyma, as well as other pineal region masses.A variety of cases of pineal lesions are presented.Knowledge of the imaging characteristics and clinical features of varying pineal lesions can assist in narrowing the differential diagnosis for more accurate and rational therapeutic planning. • Pineal parenchymal tumours show an "explosion" of normal pineal calcifications towards the periphery. • Pineoblastomas often have restricted diffusion, with apparent diffusion coefficient (ADC) values lower than germinomas. • Pineal teratomas and pineal lipomas display fat signal characteristics and fat saturation on MRI. • Pineal lesions in patients with known malignancy should raise suspicion of metastatic involvement. • Pineal cysts and arachnoid cysts show MRI signal characteristics similar to cerebrospinal fluid (CSF).

View Article: PubMed Central - PubMed

Affiliation: Department of Imaging Sciences, University of Rochester Medical Center School of Medicine and Dentistry, 601 Elmwood Ave, Box 648, Rochester, NY, 14642, USA, adam_fang@urmc.rochester.edu.

ABSTRACT

Objectives: Pineal lesions can present as a heterogeneous collection of benign and malignant disease conditions. Pineal lesions include germ cell tumours, neoplasms arising from the pineal parenchyma, as well as other pineal region masses.

Methods: A variety of cases of pineal lesions are presented. The important clinical features and typical imaging findings of each pineal lesion are described with emphasis on their morphological appearance and signal intensity characteristics on magnetic resonance imaging (MRI).

Conclusion: Knowledge of the imaging characteristics and clinical features of varying pineal lesions can assist in narrowing the differential diagnosis for more accurate and rational therapeutic planning.

Teaching points: • Pineal parenchymal tumours show an "explosion" of normal pineal calcifications towards the periphery. • Pineoblastomas often have restricted diffusion, with apparent diffusion coefficient (ADC) values lower than germinomas. • Pineal teratomas and pineal lipomas display fat signal characteristics and fat saturation on MRI. • Pineal lesions in patients with known malignancy should raise suspicion of metastatic involvement. • Pineal cysts and arachnoid cysts show MRI signal characteristics similar to cerebrospinal fluid (CSF).

No MeSH data available.


Related in: MedlinePlus