Table 2. Distribution of primary melanocytic lesions and their imaging characteristics.
| No. | Age | Sex | Diagnosis | Biopsy | Location | T1 signal | T2 signal | T1Gd | Restricted diffusion |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 3 weeks | F | Neurocutaneous melanosis | (-) | Supra-and infratentorial (meningeal+parenchymatous) | Hyper | Hypo | +;mixed* | (-) |
| 2 | 2 years | M | Neurocutaneous melanosis | (-) | Supra-and infratentorial (meningeal) | Hyper | Iso | +; Meningeal | (-) |
| 3 | 3 months | M | Neurocutaneous melanosis | (-) | Supra-and infratentorial (meningeal) | Hyper | Iso | +; Meningeal | (-) |
| 4 | 5 months | M | Neurocutaneous melanosis | (-) | Supra-and infratentorial (meningeal+parenchymatous) | Hyper | Hypo | +; mixed | (-) |
| 5 | 67 years | M | Melanocytoma | (-) | Spinal (dorsal cord) | Hyper | Hyper | +; focal | (-) |
| 6 | 43 years | M | Melanocytoma | (-) | Infratentorial | Hyper | Hypo | +; focal | (-) |
| 7 | 46 years | F | Primary malignant melanoma | (+) | Intraventricular | Hyper | Hypo | +; focal | (+) |
| 8 | 41 years | M | Primary malignant melanoma (amelanocytic) | (+) | Infratentorial | Hypo | Iso | +; focal | (-) |
M: masculine; F: feminine; (-): absent; (+): present; Hyper: hyperintensity; Hypo: hypointensity; Iso: isointensity; *mixed: both meningeal and focal enhancement.