Study of Skeletal Disorders

* INCLUSION CRITERIA: Our study population will support the mission and scientific focus of the Unit on Skeletal Genomics. We will focus enrollment of subjects (and their relatives) who fall within one of the below categories: * Individuals with a skeletal disorder that affects phosphate levels and/or metabolism * Individuals with a skeletal disorder associated with skeletal overgrowth * Individuals with a skeletal disorder or history of pregnancy affected by skeletal findings with an unknown molecular basis or unknown etiology In addition to noting the above, to be eligible to participate in this study as an affected subject, an individual must meet all of the following criteria: 1. Have a known (via clinical, radiographic or molecular diagnosis) or suspected skeletal disorder, findings associated with or increasing risk for skeletal abnormalities, or history of pregnancy affected by skeletal findings 2. State willingness to comply with study procedures and availability for the duration of the study 3. Be age 2 months or older 4. Be able to understand and sign informed consent document (or availability of a parent/guardian or LAR to provide written consent) In order to be eligible to participate in this study as an unaffected subject, an individual must meet all of the following criteria: 1. Be an unaffected family member of an affected enrolled subject 2. State willingness to comply with study procedures and availability for the duration of the study 3. Be age 2 months or older 4. Be able to understand and sign informed consent document (or availability of a parent/guardian) EXCLUSION CRITERIA: The below describe exclusion criteria for an individual to participate as an affected subject: 1. An individual who cannot or is unwilling to abide by the procedures of the protocol. 2. An individual deemed to not have sufficient signs of or risks for skeletal disease. 3. An individual who is pregnant. The below describe exclusion criteria for an individual to participate as an unaffected subject: 1. An individual who cannot or is unwilling to abide by the procedures of the protocol. 2. An individual that shows signs of skeletal disease. 3. An individual who is pregnant.