Tumoral Calcinosis, Hyperphosphatemic, Familial, 2, is also known as hftc2. An important gene associated with Tumoral Calcinosis, Hyperphosphatemic, Familial, 2 is FGF23 (Fibroblast Growth Factor 23). Affiliated tissues include skin and bone, and related phenotypes are hypercalciuria and subcutaneous calcification