Supplementary Material for: Does the New Staging System Proposed for Mycosis Fungoides and Sézary Syndrome Provide Reliable Agreement for T1 and T2 Disease?

Background: Patch or plaque stages in mycosis fungoides (MF) have different prognoses. The recent staging system proposed for MF discriminates between patches and plaques based upon clinical features. Objective: To estimate interdermatologist agreement on the morphological evaluation of MF lesions. Methods: Twenty-four patients with MF were enrolled. Two dermatologists evaluated every lesion face to face and independently with respect to the patch-plaque status. Cohen's κ was used to determine the rate of agreement. Results: Agreement was 67% with respect to the patch or plaque status [95% confidence interval (CI) = 49-85%; p Conclusion: The new system for MF staging carries a significant risk of disagreement regarding patch and plaque subsets.