Dictionary of Cancer Terms
View in Spanish: Mastocitosis sistémica
Systemic mastocytosis (sis-TEH-mik MAS-toh-sy-TOH-sis)
A rare disease in which too many mast cells (a type of immune system cell) are found in the skin, bones, joints, lymph nodes, liver, spleen, and gastrointestinal tract. Mast cells give off chemicals such as histamine that can cause flushing (a hot, red face), itching, abdominal cramps, muscle pain, nausea, vomiting, diarrhea, low blood pressure, and shock.
Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.