J95-J99: Other diseases of the respiratory system
J99: Respiratory disorders in diseases classified elsewhere
Respiratory disorders in diseases classified elsewhere refers to a group of conditions where a primary disease, originating from a different part of the body or a non-respiratory disease, leads to complications affecting the respiratory system. These circumstances can alter breathing mechanisms, reduce lung function, and compromise oxygen exchange. Common symptoms can include shortness of breath, persistent cough, chest discomfort, and fatigue. The transmission, progression, and symptoms depend on the underlying condition. For example, an autoimmune disorder might cause inflammation in lung tissues, or a cardiac disease might lead to fluid build-up in the lungs. These secondary respiratory disorders can affect the nose, throat, windpipe, and lungs, ranging from mild disturbances to severe diseases. They are typically diagnosed based on the underlying condition and the presentation of respiratory symptoms.
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