Generally, immunohistochemistry is not required when a patient’s pathology after surgery or biopsy shows inflammation. When a localized solid lesion in the body cannot be diagnosed conclusively by imaging and laboratory tests, pathology is often performed by surgical excision of the lesion or by puncture to obtain pathologic tissue. Immunohistochemistry is a special examination of cancer cells when the biopsy tissue is malignant. By means of immunohistochemistry, changes in the expression of genes or substances related to the onset of the patient’s cancer can be detected, thus guiding the clinician to carry out precise treatment. However, immunohistochemistry is not required if the pathology results in inflammatory lesions.