“…These tumors are believed to develop from leptomeningeal melanocytes, and they closely resemble the other melanocytic neoplasms of the CNS. Differential diagnosis includes the pigmented meningioma, melanotic schwannoma, primary or secondary malignant melanoma and MNTI [5, 11, 13, 14, 17, 19, 20, 21, 22, 23]. The common derivation of the respective cells of these tumors from neural crest precursors may result in difficulties in distinguishing them.…”