Hawkinsinuria, also known as 4-alpha-hydroxyphenylpyruvate hydroxylase deficiency, is related to tyrosinemia and tyrosinemia, type iii. An important gene associated with Hawkinsinuria is HPD (4-Hydroxyphenylpyruvate Dioxygenase), and among its related pathways/superpathways are Metabolism and Regulation of expression of SLITs and ROBOs. Affiliated tissues include breast, and related phenotypes are failure to thrive and sparse hair