Palmoplantar Keratoderma, Punctate Type Iii, also known as acrokeratoelastoidosis of costa, is related to ochronosis and connective tissue disease. An important gene associated with Palmoplantar Keratoderma, Punctate Type Iii is HGD (Homogentisate 1,2-Dioxygenase), and among its related pathways/superpathways are Mesenchymal Stem Cells and Lineage-specific Markers and Clock-controlled autophagy in bone metabolism. Affiliated tissues include skin, and related phenotypes are palmoplantar hyperkeratosis and hyperkeratotic papule