๐๐ฎ๐ฐ๐ธ๐๐ผ๐ปโ๐ ๐บ๐ฒ๐บ๐ฏ๐ฟ๐ฎ๐ป๐ฒ ๐ผ๐ฟ ๐ฝ๐ฟ๐ฒ๐ฐ๐ฎ๐ฒ๐ฐ๐ผ๐ฐ๐ผ๐น๐ถ๐ฐ ๐ณ๐ฎ๐๐ฐ๐ถ๐ฎ:
The precaecocolic fascia, previously known as Jacksonโs membrane, is a variable vascular peritoneal fold between the ascending colon and the right posterolateral abdominal wall. First described in 1913, it was originally thought to be of developmental or inflammatory origin and associated with ๐ฎ๐ฏ๐ฑ๐ผ๐บ๐ถ๐ป๐ฎ๐น ๐ฝ๐ฎ๐ถ๐ป.
The Jackson veil is an abnormal membrane that passes anterior to the ascending colon and permits the cecum to be mobile around the lower point of the fixation permitted by the membrane. (๐๐ ๐ถ๐ ๐ฎ ๐ฟ๐ถ๐๐ธ ๐ณ๐ฎ๐ฐ๐๐ผ๐ฟ ๐ณ๐ผ๐ฟ ๐ฐ๐ฒ๐ฐ๐ฎ๐น ๐๐ผ๐น๐๐๐น๐๐).
They varied in form and size from long and translucent to short, thick, and opaque. In structure, the fascia resembled a fold of peritoneum containing a thickened fibrous lamina. Large thin-walled arteries in the fascia crossed the arteries in the wall of the colon at the point of attachment.
Two conditions must be present for the development of a cecal volvulus: ๐ ๏ธ an abnormally mobile segment of cecum and colon and ๐ ๏ธ a fixed point around which the mobile segment can twist. The second condition is created through normal ileocolic attachments, as well as through abnormal ( Jackson veil) adhesions or after surgery or appendicitis.