Contents

SynopsisCodesLook ForDiagnostic PearlsDifferential Diagnosis & PitfallsBest TestsManagement PearlsTherapyReferences

View all Images (24)

Large plaque parapsoriasis
Other Resources UpToDate PubMed

Large plaque parapsoriasis

Contributors: Susan Burgin MD
Other Resources UpToDate PubMed

Synopsis

There continues to be debate over the definition and existence of large plaque parapsoriasis (LPP). The term was used historically to designate what was thought to be a chronic inflammatory eruption seen most often in middle-aged and elderly patients, slightly more frequently in men. In older literature 10%-30% of these cases were shown to progress to mycosis fungoides (MF), and so LPP was conceptualized as the inflammatory precursor to MF.

Given that LPP plaques resemble patch stage MF clinically but lack the criteria for the diagnosis of mycosis fungoides histopathologically, many contemporary experts conceptualize LPP to be the same as early patch stage MF and do not employ the term LPP at all. Others, however, do continue to diagnose LPP until the full histopathologic picture of mycosis fungoides is present.

Related topics: Mycosis Fungoides, Small Plaque Parapsoriasis

Codes

ICD10CM:
L41.4 – Large plaque parapsoriasis

SNOMEDCT:
67081008 – Large plaque parapsoriasis

Look For

Subscription Required

Diagnostic Pearls

Subscription Required

Differential Diagnosis & Pitfalls

To perform a comparison, select diagnoses from the classic differential

Subscription Required

Best Tests

Subscription Required

Management Pearls

Subscription Required

Therapy

Subscription Required

References

Subscription Required

Last Reviewed:10/30/2016
Last Updated:10/30/2016
Copyright © 2024 VisualDx®. All rights reserved.
Large plaque parapsoriasis
A medical illustration showing key findings of Large plaque parapsoriasis : Back, Buttocks, Chest, Leg, Fine scaly plaques
Clinical image of Large plaque parapsoriasis - imageId=41827. Click to open in gallery.  caption: 'A close-up of sharply demarcated, scaly, erythematous plaques.'
A close-up of sharply demarcated, scaly, erythematous plaques.
Copyright © 2024 VisualDx®. All rights reserved.