Mycosis Fungoides and Sezary Syndrome T1 TNM Finding v7

**Semantic type:** Finding

**Definition:** Limited patches, papules, and/or plaques covering less than 10% of the skin surface. May further stratify into T1a (patch only) vs. T1b (plaque +/- patch). Note: for skin, patch indicates any size skin lesion without significant elevation or induration. Presence/absence of hypo- or hyperpigmentation, scale, crusting, and/or poikiloderma should be noted. Plaque indicates any size skin lesion that is elevated or indurated. Presence or absence of scale, crusting, and/or poikiloderma should be noted. Histologic features such as folliculotropism or large-cell transformation (more than 25% large cells), CD30+ or CD30-, and clinical features such as ulceration are important to document. (from AJCC 7th Ed.)

**Synonyms:** - Mycosis Fungoides and Sézary Syndrome T1 TNM Finding v7