Imaging Findings of Cerebellopontine Angle Cistern Melanocytoma: A Case Report.
10.3348/jkrs.2000.42.3.439
- Author:
Sung Mi KIM
1
;
Jin Ok CHOI
;
Myung Jin JOO
Author Information
1. Department of Radiology, Presbyterian Medical Center, Chunju.
- Publication Type:Case Report
- Keywords:
Brain;
MR;
Meninges;
neoplasms;
Melanoma
- MeSH:
Brain;
Cerebellopontine Angle*;
Magnetic Resonance Imaging;
Melanocytes;
Melanoma;
Meninges;
Meningioma
- From:Journal of the Korean Radiological Society
2000;42(3):439-442
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Because melanocytes are found throughout the leptomeninges, primary melanotic pigmented tumors such as pigmented meningioma, malignant melanoma, melanoblastosis, and melanocytoma can arise from this region. Melanocytomas have been described in the literature as isodense or hyperdense compared with brain parenchyme, as seen on noncontrast-enhanced CT, and as showing relatively homogeneous enhancement. MR imaging demonstrates a high signal on T1-weighted images, and an iso to hypointense signal on T2- weighted images. We report the imaging findings of a melanocytoma that showed hyperdense attenuation on precontrast CT with homogeneous enhancement and hyperintense signal intensity on T1-weighted images and dark signal intensity enhancement on T2-weighted images, and also review the literature.
