Posts Tagged ‘HYPOTHYROIDISM’
What It Is X-Ray Exam: Bone Age Study
A bone age study helps doctors estimate of the maturity of a child’s skeletal system. It’s usually done by taking a single X-ray of the left wrist and hand — a safe and painless procedure that uses a small amount of radiation. The bones on the X-ray image are compared with X-rays images in a standard atlas of bone development, which is based on data from large numbers of other kids of the same gender and age.
A child’s bones, such as those in the fingers and wrist, contain “growing zones” at both ends called growth plates. These plates consist of special cells responsible for the bones’ growth in length. Growth plates are easy to spot on an X-ray because they’re softer and contain less mineral, making them appear darker on an X-ray image than the rest of the bone. Read the rest of this entry »
What is Down syndrome?
Down syndrome is a developmental disorder caused by an extra copy of chromosome 21 (which is why the disorder is also called “trisomy 21″). Having an extra copy of this chromosome means that each gene may be producing more protein product than normal. Cells seem to tolerate this better than having not enough protein, or having altered protein due to a mutation in the DNA sequence. However, producing too much protein can also have serious consequences, as seen in Down syndrome. Genes on chromosome 21 that specifically contribute to the various symptoms of Down syndrome are now being identified. Read the rest of this entry »
What is hypothyroidism?
The thyroid is the largest endocrine gland in the body. It sits just below the larynx (voice box) and wraps around the trachea (windpipe). The thyroid gland produces thyroid hormone, which helps the body grow and develop. It also plays an important role in the body’s metabolism (the processes in the body that use energy, such as eating, breathing, and regulating heat). Read the rest of this entry »