A patient with clinicopathologic features of small plaque parapsoriasis presenting later with plaque-stage mycosis fungoides: Report of a case and comparative retrospective study of 27 cases of “nonprogressive” small plaque parapsoriasis

Hypopigmented parapsoriasis en plaque, a new, overlooked member of the parapsoriasis family: A report of 34 patients and a 7-year experience

“…This transformation adds further proof to the similarity of this disorder to the conventional PSEP, which since its first description by Dowling 15 showed the probability of evolution into MF. 16 The conversion rate (14.7%) reported in the current work is close to that reported in small-type PSEP, in which the rate of progression to MF was reported to be 10% in one study, 17 versus 35% in the large-plaque type (LPP). Of note, the data on the progression rates to MF in PSEP are conflicting, ranging from 0% to 45%.…”

Systematic review of cases of cutaneous T-cell lymphoma transformation in pityriasis lichenoides and small plaque parapsoriasis

“…In the cases we reviewed, there was a long latency between initial presentation and CTCL diagnosis. Although SPP often persists for many years, the average duration of PLC when it follows a self‐resolving course is 1·5–31 months . Many patients developed morphological changes within plaques, including induration or nodules, poikilodermatous changes and atrophic areas.…”

Cutaneous Hematopathology

“…In small "plaque" (digitate patch) type with patchy lesions, the size and shape of fi ngerprints have a low frequency of clonal T cells, but 10 % of cases evolve to MF (Vakeva et al 2005 ;Burg and Dummer 1995 ;Hu and Winkelmann 1973 ;Haeffner et al 1995 ;Muche et al 1999 ). Some authors believe that cases evolve into CTCL and hence are part of the MF spectrum, but it must be stressed that such instances appear to be rare Belousova et al 2008 ). Conservative management is therefore recommended .…”