What should you know about leptomeningeal melanoma?

The leptomeninges are thin coverings around the brain and spinal cord. Melanoma cells can reach this space and affect the nervous system or interfere with the normal circulation of cerebrospinal fluid. Symptoms vary with the area involved and may include headache, nausea, neck stiffness, double vision, weakness, numbness, balance problems, seizures, or changes in thinking.

Assessment may include neurological examination, magnetic resonance imaging, and analysis of cerebrospinal fluid when appropriate. A specialist team interprets these findings alongside the history of melanoma and overall health.

If this diagnosis is suspected, contact the treating oncology or neurology team promptly and bring a list of medicines and recent scan reports. Management is individualised and may involve systemic treatment such as immunotherapy, treatment to relieve pressure or pain, and careful support for mobility, seizures, or nausea. The team will explain the goals and possible effects of each option.

Go to emergency care for a sudden severe headache, seizure, new weakness, facial droop, confusion, fainting, trouble speaking, or sudden loss of vision. Repeated vomiting, rapidly worsening balance, or increasing drowsiness also needs immediate assessment. Do not wait for a routine appointment when neurological symptoms are progressing.

Ask which tests are needed, what the scans and fluid results show, and whether the disease is limited to the nervous-system coverings or present elsewhere. Ask about treatment goals, symptom control, clinical support, and who to contact outside appointments.