J99: Respiratory disorders in diseases classified elsewhere
J99.1: Respiratory disorders in other diffuse connective tissue disorders
When we breathe, the air gets into the body via the respiratory tract. The respiratory tract can be divided into the upper and the lower respiratory tracts. The nose and throat form part of the upper respiratory tract. The lower respiratory tract begins at the larynx. This includes the trachea and the bronchia.
The respiratory tract ends in the air sacs in the lungs. Oxygen passes into the blood in the pulmonary alveoli (air sacs). Supporting tissue is located between the air sacs and airways in the lungs. This supporting tissue is called connective tissue.
You have another disease that is changing the connective tissue at certain sites in your body. This disorder also changes the connective tissue in your lungs or airways.
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