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Having its own blood supply, Meckel's diverticulum is susceptible to obstruction or infection. Meckel's diverticulum is located in the distal ileum, usually within 60–100 cm (2 feet) of the ileocecal valve. This blind segment or small pouch is about 3–6 cm (2 inch) long and may have a greater lumen diameter than that of the ileum. [20]
On this site of attachment, sometimes a pathological Meckel's diverticulum may be present. A mnemonic used to recall details of a Meckel's diverticulum is as follows: "2 inches long, within 2 feet of ileocecal valve , 2 times as common in males than females, 2% of population, 2% symptomatic, 2 types of ectopic tissue: gastric and pancreatic".
A diverticulum of Kommerell is an outpouching (aneurysm) of the aorta where an aberrant right subclavian artery is located. [16] It is unusual nomenclature, in that focal dilatations of a blood vessel are properly referred to as aneurysms. Cardiac diverticulum is a very rare congenital malformation of the heart that is usually benign. [17]
The yolk sac is a membranous sac attached to an embryo, formed by cells of the hypoblast layer of the bilaminar embryonic disc.This is alternatively called the umbilical vesicle by the Terminologia Embryologica (TE), though yolk sac is far more widely used.
The two can be differentiated as follows: a hamartoma is disorganized overgrowth of tissues in their normal location (e.g., Peutz–Jeghers polyps), while a choristoma is normal tissue growth in an abnormal location (e.g., osseous choristoma, [6] gastric tissue located in distal ileum in Meckel diverticulum).
The main concern is bowel strangulation, where the blood supply to part of the bowel is blocked. [1] ... Littre's hernia: a hernia involving a Meckel's diverticulum.
Meckel's diverticulum – an out-pouching of the ileum, part of the small intestine, and found in approximately 2% of the population. Meckel's cartilage – A cartilaginous bar from which the mandible is formed. Described in 1820. A syndrome – Meckel syndrome – is also named after him. This condition was described in 1822.
Usually, this structure regresses during development; in cases where it does not, it is known as Meckel's diverticulum. During fetal life, the primitive gut is gradually patterned into three segments: foregut, midgut, and hindgut. Although these terms are often used in reference to segments of the primitive gut, they are also used regularly to ...