Although an MSI-H result is the hallmark of Lynch syndrome, it is also found in 10% to 15% of sporadic CRC cases. Since MSI results do not rule out Lynch syndrome, MMR gene mutation testing should be considered regardless of MSI status in families with a strong suspicion of Lynch syndrome.
Many of the symptoms of prolactinoma are caused by an excessive amount of prolactin in the blood (hyperprolactinemia) which decreases the ovarian and testicular function. In women, prolactinoma is characterized by irregular menstrual periods, infertility and production of breast milk in women who are not pregnant (galactorrhea).
Hyperprolactinaemia can be a part of normal body changes during pregnancy and breastfeeding. It can also be caused by diseases affecting the hypothalamus and pituitary gland. It can also be caused by disruption of the normal regulation of prolactin levels by drugs, medicinal herbs and heavy metals. Hyperprolactinaemia may also be the result of disease of other organs such as the liver, kidneys, ovaries and thyroid.