Carcinoma in situ of prostate

This code represents a non-invasive malignant neoplasm of the prostate gland. In carcinoma in situ, the abnormal cells are confined to the epithelial layer and have not invaded the surrounding stroma or deeper tissues. It is considered the earliest form of prostate cancer.

Use this code when documentation clearly indicates a diagnosis of carcinoma in situ of the prostate, often identified through biopsy results. This diagnosis typically precedes more invasive forms of prostate cancer and is crucial for staging and treatment planning.

• Differentiate carefully from benign prostatic hyperplasia (BPH) or invasive adenocarcinoma of the prostate.
• Ensure pathology reports explicitly state "carcinoma in situ" or "intraductal carcinoma without stromal invasion."
• This code is for a primary diagnosis and should not be used for metastatic disease.