| Type | MGI:General | Description | hyperpigmentation at 3 weeks of age that progresses to extremely dark skin by 3 months hyperpigmentation extends into the hypodermis the trunk dermis contains abundant melanin the hair follicle bulbs of the trunk and tail develop dark, ectopic pigmentation hyperpigmentation within the cranium due to melanocyte overgrowth within the leptomeninges heavily pigmented lymph nodes in the neck and trunk |
