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A rare case of intracranial metastatic amelanotic melanoma with cyst

Department of Plastic, Reconstructive and Aesthetic Surgery, Nippon Medical School, 1–1–5, Sendagi, Bunkyo-ku, Tokyo 113–0022, Japan

Correspondence to:
Dr R Ogawa, Department of Plastic and Reconstructive Surgery, Nippon Medical School Hospital, 1–1–5 Sendagi Bunkyo-ku, Tokyo, 113–0022, Japan;
r.ogawa{at}nms.ac.jp
ABSTRACT
A rare case of intracranial metastatic amelanotic melanoma with cyst is presented. The patient was a 51 year old woman with a malignant melanoma arising on her right chest. Two years after a wide excision, skin and brain metastasis occurred. Brain magnetic resonance images demonstrated a tumour with a cyst in the left occipital lobe. Because the tumour showed low intensity on T1 weighted images and high intensity on T2 weighted images, the metastatic melanoma was identified as an amelanotic melanoma. Intracranial amelanotic melanoma is very rare, and there have been few reports of melanoma with cyst.

Keywords: amelanotic melanoma; cyst; intracranial metastasis; melanoma

Abbreviations: AJCC, American Joint Committee on Cancer; FLAIR, fluid attenuated inversion recovery; MR, magnetic resonance; T1WI, T1 weighted images; T2WI, T2 weighted images; UICC, Union Internationale Contre Cancer