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Aggressive primary pediatric intracranial malignant melanoma: Sphinx of the tissue diagnosis

1 Department of Neurosurgery, Sri Sathya Sai Institute of Higher Medical Sciences, Bengaluru, Karnataka, India
2 Department of Pathology and Transfusion Medicine, Sri Sathya Sai Institute of Higher Medical Sciences, Bengaluru, Karnataka, India
3 Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
4 Department of Radiation Oncology, Kidwai Memorial Institute of Oncology, Bengaluru, Karnataka, India

Correspondence Address:
Nandita Ghosal,
Department of Pathology and Transfusion Medicine, Sri Satya Sai Institute of Higher Medical Sciences, Whitefield, Bengaluru - 560 066, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ajns.AJNS_253_17

It is often intriguing to suspect and confirm the diagnosis of primary malignant melanoma (PMM) in the brain without any evidence of neurocutaneous melanosis. We report a 16-year-old male patient with malignant melanoma which intraoperatively was small sized, soft, fleshy, hemorrhagic in appearance resembling hematoma. Interestingly, the histopathology showed prominent papillary architecture with a differential diagnosis of papillary meningioma and ependymoma and perplexed the tissue diagnosis. This case is discussed in light of very uncommon occurrence of intracranial PMM in pediatric age group, enigmatic histological features, and aggressive nature of lesion with rapid progression despite complete excision following radiation therapy.

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