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1 Dermatofibrosarcoma protuberans Description Dermatofibrosarcoma protuberans is a rare type of cancer that causes a tumor in the deep layers of skin This condition is a type of soft tissue sarcoma. 1 HEXA gene hexosaminidase subunit alpha Normal Function The HEXA subunitsubunit beta-hexosaminidase A. Specifically, the protein produced from the HEXA gene forms the alpha subunit of this enzyme 1PIGA genephosphatidylinositol glycan anchor biosynthesis class ANormal FunctionThe PIGA gene provides instructions for making a protein called phosphatidylinositol glycan class A This protein takes p 1MelanomaDescriptionMelanoma is a type of skin cancer that begins in pigment-producing cells called melanocytes This cancer typically occurs in areas that are only occasionally sun-exposed tumors are 1 Ankylosing spondylitis Description Ankylosing spondylitis is a form of painful, ongoing joint inflammation (chronic inflammatory arthritis) that primarily affects the spine. Early symptoms of anky 1 Alpers-Huttenlocher syndrome Description Alpers-Huttenlocher syndrome is one of the most severe of a group of conditions called the POLG -related disorders. The conditions in this group feature a 1 Dupuytren contracture Description Dupuytren contracture is characterized by a deformity of the hand in which the joints of extendedextended flexedflexed supports the body's muscles, joints, organs, 1 Terminal osseous dysplasia Description Terminal osseous dysplasia is a disorder primarily involving skeletal abnormalities and certain skin changes. It is a member of a group of related conditions 1 Early-onset isolated dystonia Description Early-onset isolated dystonia is one of many forms of dystonia, which is a group of muscle contractionsmuscle contractions tremorstremors other uncontrolle 1 Ellis-van Creveld syndrome Description Ellis-van Creveld syndrome is an inherited disorder of bone growth that results in very dwarfismdwarfism lower legs and a narrow chest with short ribs. Ellis- 1 Autosomal dominant partial epilepsy with auditory features Description ADPEAFADPEAF form of epilepsy that runs in families. This disorder causes seizures usually auditoryauditory ringing. Some peop 1 Childhood absence epilepsy Description epilepsyepilepsy . This condition begins in childhood, usually between ages 3 and 8. Affected children also known as petit mal seizuresalso known as petit mal 1 Sandhoff disease Description Sandhoff disease is a rare inherited disorder that progressively destroys nerve cells ( central nervous systemcentral nervous system classified into three major types ba 1 Pantothenate kinase-associated neurodegeneration Description Pantothenate kinase-associated neurodegeneration (formerly called Hallervorden-Spatz syndrome) is a disorder of the nervous system. This 1 Hypertension Description Hypertension is abnormally high blood pressure in the arteries, which are the blood vessels that carry blood from the heart to the rest of the body. As the heart beats, it