Symptom Information: Sort according to HPO 

1
(HPO:0001034) Hypermelanotic macule 22 / 7739
2
(OMIM) Familial progressive hyperpigmentation 1 / 7739
3
(OMIM) Hyperkeratosis with increased melanin in epidermis, especially basal cell layer and tips of rete ridges 1 / 7739