Premycotic phase

Definition of premycotic phase
National Cancer Institute

premycotic phase

(PREE-my-KAH-tik fayz)
A phase of mycosis fungoides in which a patient has areas of red, scaly, itchy skin on areas of the body that are usually not exposed to sun. This is early-phase mycosis fungoides, but it is hard to diagnose the rash as mycosis fungoides during this phase. The premycotic phase may last from months to decades.

Source: NCI Dictionary of Cancer Terms