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Figure 5: Leptomeningeal pigmentation seen as discrete punctate dots tightly adherent to the intimal pial layer over the optic chiasm (a) and olfactory tract (b) in a patient with a suprasellar and third ventricular craniopharyngioma. (c) Clusters of branching reticulate leptomeningeal pigmentation (long arrow) seen at the tumor (small arrow)–brain stem interface. (d) Branching pial pigmentation seen over the lamina terminalis that is loosely adherent to the underlying neural structure and can be easily peeled off

Figure 5: Leptomeningeal pigmentation seen as discrete punctate dots tightly adherent to the intimal pial layer over the optic chiasm (a) and olfactory tract (b) in a patient with a suprasellar and third ventricular craniopharyngioma. (c) Clusters of branching reticulate leptomeningeal pigmentation (long arrow) seen at the tumor (small arrow)–brain stem interface. (d) Branching pial pigmentation seen over the lamina terminalis that is loosely adherent to the underlying neural structure and can be easily peeled off