R83-R89: Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis

R84: Abnormal findings in specimens from respiratory organs and thorax

The group of conditions classified under "Abnormal findings in specimens from respiratory organs and thorax" refers to any unusual or unexpected findings detected in medical specimens taken from an individual's respiratory system or thoracic area. These findings might be the result of various medical issues, ranging from infections to malignancies that affect organs like the lungs, bronchi, trachea, or the general thoracic region. Transmission methods vary depending upon the cause. For instance, infections can be viral or bacterial and transmitted via airborne droplets, whereas malignant conditions have numerous causes, including genetic predispositions or exposure to harmful substances like tobacco smoke or asbestos. Symptoms can vary widely, from persistent coughs to chest pain or difficulty breathing. Disease progression is also dependent on the underlying cause but could range from gradually worsening pulmonary function to the rapid spread of cancer cells.