Malignant melanoma meningeal metastasis with concurrent hemorrhagic cerebrospinal fluid: A case report.

Malignant melanoma meningeal metastasis (MMMM) is a rare clinical condition with a poor prognosis. The observation of hemorrhagic cerebrospinal fluid (CSF) in this type of disease is relatively uncommon and may indicate disease progression. The present study reports the case of a 51-year-old male with malignant melanoma who presented with a headache. Imaging studies did not identify abnormalities; however, an analysis of the CSF revealed hemorrhagic changes. The results of cytological examination of the CSF showed melanoma cells, leading to the final diagnosis of MMMM. This case emphasizes the importance of monitoring neurological symptoms and conducting comprehensive CSF cytological examination in patients with melanoma, creating disease awareness in clinicians.