R89: Abnormal findings in specimens from other organs, systems and tissues
R89.7: Abnormal findings in specimens from other organs, systems and tissues : abnormal histological findings
Tissue is usually examined under a microscope. The pieces of tissue are usually stained beforehand so that any changes can be detected more easily.
Changes in the sample can be an indication of a disease. The results can also depend on factors like when the sample is taken or how the sample is stored until it is examined.
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If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.