Journal Information
Vol. 19. Issue 4.
Pages 365-367 (January 2008)
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Vol. 19. Issue 4.
Pages 365-367 (January 2008)
A cystic amelanotic melanoma metastasis to the brain: case report
Metástasis cerebral de un melanoma amelanótico quístico
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B. Cemil
, H. Emmez, N. Oztanır, F. Dogulu
Department of Neurosurgery. Gazi University School of Medicine. Ankara. Turkey
N. Tokgoz*
* Department of Radiology. Gazi University School of Medicine. Ankara. Turkey
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Summary

As far as we know, cyst formation in intracranial melanoma is rare, and only 15 cases of intracranial amelanotic melanoma have been reported until now. A yellowish mass was observed in the frontal lobe. The content of the cyst consisted of old hematoma, xanthochromic fluid and necrotic tissue, was evacuated and the cyst wall was totally resected. No abnormal pigmentation was noted in the cyst wall and surrounding brain tissue. The imaging features of metastatic melanomas are distinctive due to the presence of melanin and the propensity for hemorrhage. Both hemorrhage and melanin can produce T1-weighted hyperintensity and T2-weighted signal intensity loss.

Key words:
Melanoma
Brain metastases
Brain abscess
Resumen

Que sepamos, la formación quística de un melanoma intracraneal es rara y sólo se han descrito 15 casos de melanoma intracraneal amilanocítico. Se observó una masa amarillenta en el lóbulo frontal. El contenido del quiste consistía en un hematoma antiguo, con líquido xantocrómico tejido necrótico que se evacuó, con resección total de la pared del quiste. No se encontró ninguna pigmentación anormal en la pared ni en el tejido cerebral adyacente. Las imágenes de los melanomas metastásicos son muy peculiares, debido a la presencia de melanina y a la propensión a la hemorragia. Ambos, hemorragia y melanina pueden producir hiperseñal en T1 e hiposeñal en T2.

Palabras clave:
Melanoma
Metástasis cerebral
Absceso cerebral

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