MR imaging of intracranial metastatic melanoma.
Publication/Presentation Date
1-1-1987
Abstract
Ten patients with intracerebral metastases from malignant melanoma were evaluated with magnetic resonance (MR) imaging performed at 1.5 T using spin-echo techniques. On the basis of histopathologic findings in three of 10 cases and CT appearances in all 10 cases, three patterns were identified on analysis of MR signal intensities in both short repetition time/echo time (TR/TE) and long TR/TE spin-echo scans. In comparison to normal cortex, nonhemorrhagic melanotic melanoma appeared markedly hyperintense on short TR/TE images and isointense, mildly hypointense on long TR/TE images. Nonhemorrhagic, amelanotic melanoma appeared isointense or mildly hypointense on short TR/TE and isointense or mildly hyperintense on long TR/TE images. Hemorrhagic melanoma varied in appearance, depending on the stage of hemorrhage. Melanotic, nonhemorrhagic melanoma can be distinguished from early and late subacute hemorrhage by its signal intensity on long TR/TE images. Spin-echo MR appears to be the method of choice for diagnosing melanotic metastases.
Volume
11
Issue
4
First Page
577
Last Page
582
ISSN
0363-8715
Published In/Presented At
Atlas, S. W., Grossman, R. I., Gomori, J. M., Guerry, D., Hackney, D. B., Goldberg, H. I., Zimmerman, R. A., & Bilaniuk, L. T. (1987). MR imaging of intracranial metastatic melanoma. Journal of computer assisted tomography, 11(4), 577–582. https://doi.org/10.1097/00004728-198707000-00003
Disciplines
Medicine and Health Sciences | Pediatrics
PubMedID
3597877
Department(s)
Department of Pediatrics
Document Type
Article