Hemihyperplasia-Multiple Lipomatosis Syndrome, also known as hhml, is related to lipomatosis, familial multiple and hemihyperplasia, isolated. An important gene associated with Hemihyperplasia-Multiple Lipomatosis Syndrome is PIK3CA (Phosphatidylinositol-4,5-Bisphosphate 3-Kinase Catalytic Subunit Alpha). Affiliated tissues include skin and testis, and related phenotypes are overgrowth and macrodactyly