ICD-11 definition : Large plaque parapsoriasis is a chronic skin disorder characterized by the indolent
development over years or decades of scaly patches or slightly elevated plaques which
may be clinically indistinguishable from early mycosis fungoides but in which no evidence
of infiltration by abnormal lymphocytes can be found. Approximately 10% of patients
will, however, eventually progress to mycosis fungoides.;
Large plaque parapsoriasis is a chronic skin disorder characterized by the indolent
development over years or decades of scaly patches or slightly elevated plaques which
may be clinically indistinguishable from early mycosis fungoides but in which no evidence
of infiltration by abnormal lymphocytes can be found. Approximately 10% of patients
will, however, eventually progress to mycosis fungoides.