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U.S. National Institutes of Health National Cancer Institute
Dictionary of Cancer Terms
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stage I mycosis fungoides and the Sézary syndrome (...my-KOH-sis fun-GOY-deez ... say-zah-REE SIN-drome)

 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.

Previous Definitions:stage I lip and oral cavity cancer, stage I malignant mesothelioma, stage I melanoma, stage I Merkel cell carcinoma, stage I multiple myeloma
Next Definitions:stage I nasopharyngeal cancer, stage I non-small cell lung cancer, stage I nonmelanoma skin cancer, stage I oropharyngeal cancer, stage I ovarian epithelial cancer