^"Male Genitals - Prostate Neoplasms". Pathology study images. University of Virginia School of Medicine. مؤرشف من الأصل في 2011-04-28. اطلع عليه بتاريخ 2011-04-28. There are many connections between the prostatic venous plexus and the vertebral veins. The veins forming the prostatic plexus do not contain valves and it is thought that straining to urinate causes prostatic venous blood to flow in a reverse direction and enter the vertebral veins carrying malignant cells to the vertebral column.
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صور تشريحية:44:05-0103 في مركز داونستيت الطبي التابع لجامعة نيويورك - "حوض الذكر: غدة البروستات"
