Hyperpigmentation with or Without Hypopigmentation, Familial Progressive, also known as fphh, is related to lentigines and familial progressive hyperpigmentation. An important gene associated with Hyperpigmentation with or Without Hypopigmentation, Familial Progressive is KITLG (KIT Ligand), and among its related pathways/superpathways are Pleural mesothelioma and Pluripotent stem cell differentiation pathway. Affiliated tissues include skin.