stage I mycosis fungoides and the Sézary syndrome

(...my-KOH-sis fun-GOY-deez...) Stage I is divided into stages IA and IB. In stage IA, less than 10% of the skin surface is covered with patches and/or plaques (areas of abnormal tissue). In stage IB, 10% or more of the skin surface is covered with patches and/or plaques. Stage I may also be classified based on how many abnormal lymphocytes (white blood cells) are found in the blood.