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Stage Information for Prostate Cancer


    Pelvic lymph node dissection (PLND)

    PLND remains the most accurate method to assess metastasis to the pelvic nodes, and laparoscopic PLND has been shown to accurately assess pelvic nodes as effectively as an open procedure.[5]

    The determining factor in deciding whether any type of PLND is indicated is when definitive therapy may be altered. For example, radical prostatectomy is generally reserved for men without lymph node metastasis. Likewise, preoperative seminal vesicle biopsy may be useful in patients with palpable nodules who are being considered for radical prostatectomy (unless they have a low Gleason score) because seminal vesicle involvement could affect the choice of primary therapy and predicts for pelvic lymph node metastasis.[6]

    In patients with clinically localized (stage I or stage II) prostate cancer, Gleason pathologic grade and enzymatic serum prostatic acid phosphatase values (even within normal range) predict the likelihood of capsular penetration, seminal vesicle invasion, or regional lymph node involvement.[7] Analysis of a series of 166 patients with clinical stage I or stage II prostate cancer undergoing radical prostatectomy revealed an association between Gleason biopsy score and the risk of lymph node metastasis found at surgery. The risks of nodal metastasis for patients grouped according to their Gleason biopsy score was 2%, 13%, and 23% for Gleason scores of 5, 6, and 8, respectively.[8]

    Whether to subject all patients to a PLND is debatable, but in patients undergoing a radical retropubic prostatectomy, nodal status is usually ascertained as a matter of course. In patients who are undergoing a radical perineal prostatectomy in whom the PSA value is less than 20 ng/ml and the Gleason sum is low, however, evidence is mounting that a PLND is probably unnecessary, especially in patients whose malignancy was not palpable but detected on ultrasound.[7,9]

    Transrectal or transperineal biopsy

    The most common means to establish a diagnosis and determine the Gleason score in cases of suspected prostate cancer is by needle biopsy. Most urologists now perform a transrectal biopsy using a bioptic gun with ultrasound guidance. Over the years, there has been a trend toward taking eight to ten or more biopsy samples at the same time.[1] Less frequently, a transperineal, ultrasound-guided approach can be used for those patients who may be at increased risk of complications from a transrectal approach.[10]


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