An enlarged prostate is common in men with prostate cancer. The organ is in the lower pelvic area, just below the bladder and in front of the rectum. Due to its location, an enlarged prostate can lead to discomfort, especially when sitting. The groin also has several lymph nodes close to the prostate that help the body fight off infections. Cancer cells often spread to these lymph nodes first, preventing them from functioning properly and causing swelling, which leads to soreness or discomfort.

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