Related Experiment Videos
Parapsoriasis en plaques: its potential for progression to malignant lymphoma
1Department of Dermatology, Keio University School of Medicine, Tokyo, Japan.
Journal of the American Academy of Dermatology
|September 1, 1993
Summary
Distinguishing early cutaneous T-cell lymphoma (CTCL) from parapsoriasis en plaques is challenging. Clinical, histopathologic, and immunophenotype features do not reliably differentiate these conditions, necessitating careful monitoring for parapsoriasis patients.
Area of Science:
- Dermatology
- Oncology
- Immunology
Background:
- Parapsoriasis en plaques (large-plaque type) is a premalignant condition.
- It has the potential to progress to cutaneous T-cell lymphoma (CTCL).
- Early differentiation between parapsoriasis en plaques and CTCL remains unclear.
Purpose of the Study:
- To determine if parapsoriasis en plaques can evolve into CTCL.
- To investigate the relationship between parapsoriasis en plaques and CTCL development.
Main Methods:
- Analysis of 20 cases of parapsoriasis en plaques.
- Evaluation of clinical appearance, histopathology, immunophenotype, and DNA rearrangements.
- Assessment of clinical course and gene rearrangement detection.
Main Results:
- T-cell receptor beta-chain gene rearrangement was identified in 4 out of 20 cases.
- No significant differences in clinical, histopathologic, or immunohistochemical features were observed between patients with and without gene rearrangement.
- Monoclonal proliferation may be present in some parapsoriasis en plaques cases.
Conclusions:
- Early-stage CTCL cannot be reliably distinguished from parapsoriasis en plaques using current clinical, histopathologic, or immunophenotypic methods.
- Parapsoriasis en plaques presents with heterogeneous findings, including potential monoclonal proliferation.
- Long-standing, treatment-resistant parapsoriasis requires vigilant monitoring for potential cutaneous lymphoma development.