Enthesopathy in patients with nail psoriasis - a cross-sectional evaluation of clinical, onychoscopic and ultrasonographic features

Ultrasonography for the assessment of enthesitis in psoriatic arthritis: systematic review with meta-analysis

OBJECTIVES

The specificity of US for enthesitis in PsA is unclear. The objective was to analyse the specificity of US enthesitis in Mode B and using power Doppler for the diagnosis of PsA through a systematic review with meta-analysis.

METHODS

Systematic review in PubMed 2010 to June 2023 of studies of adult patients with confirmed PsA with or without a control group of non-PsA patients, reporting information on US enthesitis. Data were analysed on (i) the prevalence of US enthesitis (presence of at least one enthesitis) in PsA patients and non-PsA patients, (ii) specificity and sensitivity of US enthesitis and then specifically power Doppler for PsA diagnosis and (iii) most specific localizations of enthesitis in PsA patients. Pooled percentages and means were evaluated using univariate random effects meta-analysis.

RESULTS

In 76 articles, 5927 patients with PsA were compared with 3423 controls (59.0% of whom had psoriasis). The prevalence of US enthesitis was 73.7% (95% CI 56.6-90.9%) in PsA patients vs 12.6% (2.6-22.3%) in controls. The pooled specificity and sensitivity of Mode B US were 73.2% (59.3-87.0%) and 62.1% (47.9-76.4%); and of power Doppler, were 97.9% (96.5-99.5%) and 14.7% (8.2-21.2%), respectively. The site most frequently involved in PsA but not in controls was the Achilles tendon, in which erosions and power Doppler activity were most discriminant.

CONCLUSION

In this systematic review, US enthesitis was highly prevalent in PsA patients. Evidencing enthesitis by US was found to be reasonably specific and could contribute to the diagnosis of PsA; power Doppler was highly specific, however it was rarely present.

Dermoscopic Nail Changes in Psoriasis, Lichen Planus, and Lichen Striatus

Background

Onychoscopy is a noninvasive method helpful in diagnosing nail disorders. The aim of the study was to review literature on the usability of onychoscopy in nail psoriasis, nail lichen planus, and nail lichen striatus.

Summary

Onychoscopic features of nail psoriasis are pitting, onycholysis with erythematous border, salmon patches, splinter hemorrhages, dotted vessels in lateral and proximal folds, and hyponychium. Onychoscopic features of nail lichen planus are onychorrhexis, onycholysis, longitudinal melanonychia, and red lunula. The literature on the usability of onychoscopy in nail lichen striatus is scarce.

Keynotes

Onychoscopy facilitates evaluation of nail abnormalities compared to the clinical examination. Lunular alterations, salmon patches, erythematous border of onycholysis as well as splinter hemorrhages in nail psoriasis are better visualized with onychoscopy compared to the naked eye. Onychoscopy enhances detection of melanonychia, dyschromia, and lunular changes in nail lichen planus. Onychoscopic features are different in fingernails and toenails.

What Is New in Nail Psoriasis?

<b><i>Background:</i></b> Nail involvement is very frequent in psoriasis and may significantly affect patients’ quality of life due to clinical and functional impairment. In addition, nail psoriasis constitutes a negative prognostic factor for the development of psoriatic arthritis (PsA), even in the absence of cutaneous disease. <b><i>Summary:</i></b> Herein we provide an updated review on the diagnostic evaluation of nail psoriasis using clinical assessment and implementation of imaging techniques including dermoscopy, capillaroscopy, ultrasonography, and optical coherence tomography. In addition, we summarize consensus guidelines for the management of nail psoriasis and provide efficacy data on the use of intralesional, topical, and the most recently approved targeted systemic therapies. <b><i>Key Messages:</i></b> Physicians should be aware of the importance of prompt diagnosis and management of nail psoriasis, to improve patient outcomes and decrease the risk of PsA development.

Nail psoriasis and nail lichen planus: Updates on diagnosis and management

BACKGROUND

Inflammatory diseases of the nail, including nail psoriasis and nail lichen planus, are associated with significant disease burden and have a negative impact on quality of life. Diagnosis is often delayed, especially when patients present without cutaneous findings. Therefore, recognizing clinical signs and symptoms of inflammatory nail diseases, and initiating timely and appropriate treatment, is of utmost importance.

OBJECTIVE

We review recent studies on diagnostic techniques, discuss severity grading and scoring systems, and describe consensus treatment recommendations for nail psoriasis and nail lichen planus.

METHODS

An updated literature review was performed using the PubMed database on studies assessing diagnostic techniques or treatment modalities for nail psoriasis and nail lichen planus.

RESULTS

Recent studies on diagnostic techniques for inflammatory nail disease have focused on use of dermoscopy, capillaroscopy, and ultrasound modalities. Treatment of these conditions is dichotomized into involvement of few (≤3) or many (>3) nails. Recent psoriatic therapeutics studied for nail outcomes include brodalumab, tildrakizumab, risankizumab, deucravacitinib, and bimekizumab, while emerging treatments for nail lichen planus include JAK inhibitors and intralesional platelet rich plasma injections.

CONCLUSIONS

We emphasize the need for increased awareness and expanded management strategies for inflammatory nail diseases to improve patient outcomes.