Objective: To determine the effectiveness of topical corticosteroids i
n the management of mycosis fungoides. Design: Prospective study. Sett
ing: Academic referral center, Veterans Affairs Medical Center, and pr
ivate practice. Patients: Seventy-nine patients with patch or plaque s
tage of mycosis fungoides. Fifty-one were stage T1 (less than 10% of s
kin involved) and 28 were stage T2 (10% or more of skin involved). Sev
enty-five had patch-stage and 4 had plaque-stage disease as determined
by histological examination. Interventions: Patients were treated wit
h topical class I to III corticosteroids. Of the stage T1 patients, al
l used class I corticosteroids, and 4 (8%) also used class II or III c
orticosteroids. Of the stage T2 patients, 19 (68%) used class I and 12
(43%) used class II or III compounds. Some patients used more than 1
class of corticosteroid. Applications were almost always twice daily.
Three stage T1 and 2 stage T2 patients used plastic film occlusion. Ba
seline and monthly morning serum cortisol levels were obtained during
treatment. Main Outcome Measures: Response to treatment and side effec
ts. Results: The median follow-up period was 9 months. Thirty-two (63%
) of stage T1 patients achieved complete remission and 16 (31%) achiev
ed partial remission, for a total response rate of 48 (94%). The compa
rable figures for stage T2 patients were 7 (25%), 16 (57%), and 23 (82
%), respectively. Responses were determined by clinical examination. T
hirty-nine patients achieved clinical clearing. In 7 of these, posttre
atment biopsy speciments were obtained, and all showed histological cl
earing. Reversible depression of serum cortisol levels occurred in 10
(13%). Minor skin irritation occurred in 2 patients and localized, rev
ersible skin atrophy in 1. Conclusion: Topical corticosteroids, especi
ally class I compounds, are an effective treatment for patch-stage myc
osis fungoides.