J Korean Radiol Soc.
2000 Mar;42(3):439-442. 10.3348/jkrs.2000.42.3.439.
Imaging Findings of Cerebellopontine Angle Cistern Melanocytoma: A Case Report
- Affiliations
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- 1Department of Radiology, Presbyterian Medical Center, Chunju.
- 2Department of Anatomical Pathology, Presbyterian Medical Center, Chunju.
- KMID: 2103531
- DOI: http://doi.org/10.3348/jkrs.2000.42.3.439
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.
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