Modified Severity Weighted Assessment Tool

**Semantic type:** Intellectual Product

**Definition:** A clinical measurement tool for measuring skin tumor burden in mycosis fungoides (MF) and Sezary syndrome (SS). It involves determining the percentage of body surface area (BSA) covered by patch, plaque, or tumor of MF/SS, then multiplying each lesion BSA by a factor that gives gradations of weight to patch versus plaque versus tumor and summing these scores. The change in mSWAT from the beginning of treatment can be used to assess overall response.

**Synonyms:** - Modified Severity Weighted Assessment Tool - mSWAT - mSWAT