Abstract
We perform laparoscopic inguinal hernioplasty with the TANKO-Totally extraperitoneal repair (TEP) technique. There are misunderstandings that the prevesical space (Retzius space), the route of penetration in the surgery, is the pre-peritoneal space (Bogros space) between the superficial and deep layers of the pre-peritoneal fascia, and also that the bladder is not covered with the deep layer of pre-peritoneal fascia because it is derived from endoderm. The Retzius space is a sparse cavity lying between transversalis fascia and the superficial layer. This is different from the pre-peritoneal space owing to the boundary surface of the superficial layer and lack of communication between them. Bladder epithelium is derived from endoderm, and bladder (''space'') is embedded in vesical fascia as the pre-peritoneal fascia continues from mesodermally derived renal fascia.
