Mastocytosis classification

Classification
The presence of too many mast cells, or mastocytosis, can occur in a variety of forms.


 * Most cases are cutaneous (confined to the skin only). There are several forms of cutaneous mastocytosis. The most common is called urticaria pigmentosa (UP). It mostly affects children. Telangiectasia Macularis Eruptiva Perstans (TMEP) is a much rarer form of cutaneous mastocytosis that affects adults.


 * Systemic mastocytosis involves the internal organs, usually in addition to involving the skin. Mast cells collect in various tissues and can affect organs such as the liver, spleen, lymph nodes, and bone marrow.