Intracranial meningeal melanocytoma: CT and MRI

C. J. Chen; Y. I. Hsu; Y. S. Ho; Y. H. Hsu; L. J. Wang; Y. C. Wong

doi:10.1007/s002340050510

Intracranial meningeal melanocytoma: CT and MRI

C. J. Chen, Y. I. Hsu, Y. S. Ho, Y. H. Hsu, L. J. Wang, Y. C. Wong

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56 Citations (Scopus)

Abstract

We report the MRI and CT findings of an intracranial meningeal melanocytoma (IMM) arising from Meckel's cave and review the imaging characteristics of IMM. On CT, IMM constantly appear as well-circumscribed, isodense to slightly dense, extra-axial tumours with homogeneous contrast enhancement. This appearance is nonspecific and similar to that of meningiomas or small neuromas. On MRI, the signal of IMM is strongly related to the amount of melanin pigment: the more melanin, the more shortening of T1 and T2 relaxation times. Only when it shows as a homogeneous mass, bright on T1 and dark on T2 weighting, can a specific diagnosis of a melanin-containing tumour be made. However, this still cannot provide a distinction between IMM and malignant meningeal melanoma.

Original language	English
Pages (from-to)	811-814
Number of pages	4
Journal	Neuroradiology
Volume	39
Issue number	11
DOIs	https://doi.org/10.1007/s002340050510
Publication status	Published - 1997
Externally published	Yes

Keywords

Computed tomography
Magnetic resonance imaging
Meningeal melanocytoma

ASJC Scopus subject areas

Radiology Nuclear Medicine and imaging
Clinical Neurology
Radiological and Ultrasound Technology

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10.1007/s002340050510

Cite this

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title = "Intracranial meningeal melanocytoma: CT and MRI",

abstract = "We report the MRI and CT findings of an intracranial meningeal melanocytoma (IMM) arising from Meckel's cave and review the imaging characteristics of IMM. On CT, IMM constantly appear as well-circumscribed, isodense to slightly dense, extra-axial tumours with homogeneous contrast enhancement. This appearance is nonspecific and similar to that of meningiomas or small neuromas. On MRI, the signal of IMM is strongly related to the amount of melanin pigment: the more melanin, the more shortening of T1 and T2 relaxation times. Only when it shows as a homogeneous mass, bright on T1 and dark on T2 weighting, can a specific diagnosis of a melanin-containing tumour be made. However, this still cannot provide a distinction between IMM and malignant meningeal melanoma.",

keywords = "Computed tomography, Magnetic resonance imaging, Meningeal melanocytoma",

author = "Chen, {C. J.} and Hsu, {Y. I.} and Ho, {Y. S.} and Hsu, {Y. H.} and Wang, {L. J.} and Wong, {Y. C.}",

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TY - JOUR

T1 - Intracranial meningeal melanocytoma

T2 - CT and MRI

AU - Chen, C. J.

AU - Hsu, Y. I.

AU - Ho, Y. S.

AU - Hsu, Y. H.

AU - Wang, L. J.

AU - Wong, Y. C.

PY - 1997

Y1 - 1997

N2 - We report the MRI and CT findings of an intracranial meningeal melanocytoma (IMM) arising from Meckel's cave and review the imaging characteristics of IMM. On CT, IMM constantly appear as well-circumscribed, isodense to slightly dense, extra-axial tumours with homogeneous contrast enhancement. This appearance is nonspecific and similar to that of meningiomas or small neuromas. On MRI, the signal of IMM is strongly related to the amount of melanin pigment: the more melanin, the more shortening of T1 and T2 relaxation times. Only when it shows as a homogeneous mass, bright on T1 and dark on T2 weighting, can a specific diagnosis of a melanin-containing tumour be made. However, this still cannot provide a distinction between IMM and malignant meningeal melanoma.

AB - We report the MRI and CT findings of an intracranial meningeal melanocytoma (IMM) arising from Meckel's cave and review the imaging characteristics of IMM. On CT, IMM constantly appear as well-circumscribed, isodense to slightly dense, extra-axial tumours with homogeneous contrast enhancement. This appearance is nonspecific and similar to that of meningiomas or small neuromas. On MRI, the signal of IMM is strongly related to the amount of melanin pigment: the more melanin, the more shortening of T1 and T2 relaxation times. Only when it shows as a homogeneous mass, bright on T1 and dark on T2 weighting, can a specific diagnosis of a melanin-containing tumour be made. However, this still cannot provide a distinction between IMM and malignant meningeal melanoma.

KW - Computed tomography

KW - Magnetic resonance imaging

KW - Meningeal melanocytoma

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Intracranial meningeal melanocytoma: CT and MRI

Abstract

Keywords

ASJC Scopus subject areas

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