A: The function of the cartilaginous rings of the trachea is to stabilize the trachea and keep it rigid while allowing the trachea to expand and lengthen when the person breathes. If the trachea was not supported in this way, it would simply collapse because of the pressure of the chest.
HCM remains the most common cardiovascular genetic disorder, occurring in at least 1 in 500 people in the general population. 7 HCM is a primary inherited disorder of the myocardium characterized by hypertrophy, usually of the left ventricle, in the absence of other loading conditions such as hypertension.
This germline genetic test requires physician attestation that patient consent has been received if ordering medical facility is located in AK, DE, FL, GA, IA, MA, MN, NV, NJ, NY, OR, SD or VT or test is performed in MA. Spinal muscular atrophy (SMA) is one of the most common autosomal recessive diseases. SMA is characterized by the degeneration of the anterior horn cells of the spinal cord which leads to symmetric proximal muscle weakness. The estimated incidence of SMA is 1/6,000 to 1/10,000 live births with a carrier frequency of 1/40 to 1/60.