Evidence map›Paper›PMID 42513452›Full record

ReviewJournal of clinical medicine2026

Exploring Rare and Atypical Forms of Psoriasis: A Narrative Review.

Federico Bardazzi, Giorgio De Benedetto, Giacomo Clarizio, Lidia Sacchelli, Alessio Natale, Marco Adriano Chessa, Iria Neri, Michelangelo La Placa, Riccardo Balestri

Abstract readReview
In one paragraph

Review in Journal of clinical medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Federico BardazziDermatology Unit, IRCCS Azienda Ospedaliero, Universitaria di Bologna, 40138 Bologna, Italy.ORCID 0000-0001-6162-2004
Giorgio De BenedettoDermatology Unit, IRCCS Azienda Ospedaliero, Universitaria di Bologna, 40138 Bologna, Italy.ORCID 0009-0003-0725-8506
Giacomo ClarizioDermatology Unit, IRCCS Azienda Ospedaliero, Universitaria di Bologna, 40138 Bologna, Italy.ORCID 0000-0003-3849-4213
Lidia SacchelliDermatology Unit, IRCCS Azienda Ospedaliero, Universitaria di Bologna, 40138 Bologna, Italy.ORCID 0000-0003-4388-4523
Alessio NataleDermatology Unit, IRCCS Azienda Ospedaliero, Universitaria di Bologna, 40138 Bologna, Italy.ORCID 0009-0001-3984-4708
Marco Adriano ChessaDermatology Unit, IRCCS Azienda Ospedaliero, Universitaria di Bologna, 40138 Bologna, Italy.
Iria NeriDermatology Unit, IRCCS Azienda Ospedaliero, Universitaria di Bologna, 40138 Bologna, Italy.ORCID 0000-0002-8552-0771
Michelangelo La PlacaDermatology Unit, IRCCS Azienda Ospedaliero, Universitaria di Bologna, 40138 Bologna, Italy.ORCID 0000-0002-6894-3350
Riccardo BalestriDivision of Dermatology, Psoriasis Outpatient Service, Azienda Sanitaria Universitaria Integrata del Trentino (ASUIT)-Trento Hospital, 38122 Trento, Italy.ORCID 0000-0002-0885-054X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Psoriasis is a chronic immune-mediated inflammatory dermatosis characterized by marked clinical heterogeneity. Although plaque psoriasis represents the most common phenotype, several uncommon and atypical variants may pose considerable diagnostic challenges because of their unusual morphology, distribution, and clinicopathological presentation. Early recognition of these rare forms is essential to avoid misdiagnosis and inappropriate management. This narrative review summarizes the current evidence regarding selected atypical variants of psoriasis, including psoriasis gyrata, linear psoriasis, follicular psoriasis, psoriatic onycho-pachydermo-periostitis, psoriatic neurodermatitis, interdigital psoriasis, parakeratosis pustulosa, psoriasis of the lips, psoriasiform acral dermatitis, psoriasis dermatitis, and extreme hyperkeratotic forms. For each entity, we discuss epidemiology, clinical presentation, dermoscopic and histopathological findings, differential diagnosis, pathophysiological hypotheses, and therapeutic considerations. Particular attention is given to distinguishing these entities from inflammatory, infectious, and neoplastic mimickers. The integration of clinical evaluation with dermoscopy and histopathological examination remains crucial in challenging cases. Awareness of these uncommon variants may improve diagnostic accuracy and facilitate timely therapeutic intervention.

Indexed as

atypical psoriasispsoriasisrare psoriasis variants

Identifiers

PMID42513452
PMCPMC13412992

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.