A mesenteric cyst (MeSH C04.182.473) is a cyst in the mesenterium, and is one of the rarest abdominal tumors, with approximately 822 cases reported since 1507. The incidence is between 1 per 100,000 to 1 per 250,000 hospital admissions.Tillauxs triad named after the French surgeon Paul Jules Tillaux can be seen in cases of mesenteric cyst. It consists of the following signs:
a fluctuating swelling near the umbilicus,
freely mobile in the direction perpendicular to the attachment of mesentry,
with a zone of resonance around the swelling.It is basically of two types :
1. Chylolymphatic most common type, thin wall, lined by flat endotheliun, clear chylous fluid present, separate blood vessels
2. Enterogenous-thick wall, lined by columnar, mucinous fluid present common blood supply


== References ==
Y279C, T468M, A461T, G464A, and Q510P which seems to be a unique familial mutation, in that all other variants are caused by transition errors, rather than transversion. Treatment
It is suggested that, once diagnosed, individuals be routinely followed by a cardiologist, endocrinologist, dermatologist, and other appropriate specialties as symptoms present. It is recommended that those with the syndrome who are capable of having children seek genetic counseling before deciding to have children. As the syndrome presents frequently as a forme fruste (incomplete, or unusual form) variant, an examination of all family members must be undertaken. As an autosomal dominant trait there is a fifty percent chance with each child that they will also be born with the syndrome. Although fully penetrant, since the syndrome has variable expressivity, one generation may have a mild expression of the syndrome, while the next may be profoundly affected. Once a decision to have children is made, and the couple conceives, the fetus is monitored during the pregnancy for cardiac evaluation. If a gross cardiac malformation is found, parents receive counseling on continuing with the pregnancy. Other management is routine care as symptoms present:
For those with endocrine issues (low levels of thyrotopin [a pituitary hormone responsible for regulating thyroid hormones], follicle stimulating hormone) drug therapy is recommended. For those who are disturbed by the appearance of lentigines, cryosurgery may be beneficial. Due to the large number of lentigines this may prove time-consuming. An alternative treatment with tretinoin or hydroquinone creams may help.