Abby Jackson Â· Business Insider 01 Sep 2017. South Africa just saw its credit rating downgraded after two of the three major ratings agencies issued depressing assessments of the state of the countryâs economy.
Mastocytosis (say âmas-toe-sigh-toe-sisâ) is a rare disease of the skin (the most common form), or of other parts of the body (very rare), like the stomach, the intestines and the bone marrow.It's caused by having too many mast cells. Mast cells are a kind of blood cell.Mastocytosis can occur at any age.astocytosis (say âmas-toe-sigh-toe-sisâ) is a rare disease of the skin (the most common form), or of other parts of the body (very rare), like the stomach, the intestines and the bone marrow.
What is mastocytosis. Mastocytosis is a group of rare disorders caused by the presence of too many mast cells, or (mastocytes), which are part of the immune system.he increased number of mast cells in the tissues in mastocytosis is due to acquired genetic mutations in a protein called c-kit. Since this disease is an abnormal increased growth of genetically abnormal blood cells, mastocytosis is classified as a myeloproliferative neoplasm (MPN).