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Author Spotlight: Self-Assessment Protocol for Predicting Psoriatic Arthritis in Psoriasis Patients
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Diagnostic Algorithm for Axial Involvement in Psoriatic Arthritis.

E E Gubar1, T V Korotaeva2, L D Vorobyova2

  • 1Nasonova Research Institute of Rheumatology, Moscow, Russia. gubarelena@yandex.ru.

Doklady. Biochemistry and Biophysics
|March 30, 2026
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Summary
This summary is machine-generated.

A new diagnostic algorithm for axial psoriatic arthritis (axPsA) was developed, emphasizing imaging for all psoriatic arthritis patients. This approach aids in identifying axial involvement, even in cases without clear inflammatory back pain (IBP).

Keywords:
axial involvementpsoriatic arthritis

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Area of Science:

  • Rheumatology
  • Immunology
  • Radiology

Background:

  • Axial psoriatic arthritis (axPsA) diagnosis can be challenging, often overlapping with other inflammatory conditions.
  • Early and accurate diagnosis of axPsA is crucial for effective management and preventing long-term joint damage.

Purpose of the Study:

  • To develop and validate a unified diagnostic algorithm for axial psoriatic arthritis (axPsA).
  • To improve the detection of axial involvement in psoriatic arthritis (PsA) patients, irrespective of back pain presentation.

Main Methods:

  • 122 PsA patients meeting CASPAR criteria with axial involvement were studied.
  • Diagnostic criteria included radiographic sacroiliitis (rSI), MRI sacroiliitis (MRI-SI), spinal syndesmophytes, or facet joint ankylosis.
  • Patients were assessed for inflammatory back pain (IBP) using ASAS criteria and chronic back pain (chrBP).

Main Results:

  • 87% of patients experienced IBP, while 28.7% had chrBP; 69.7% showed rSI, and 82% had spinal lesions.
  • Isolated axial disease without peripheral arthritis was rare (1.6%).
  • Spinal lesions were common, with 30.3% having isolated spinal lesions without rSI.

Conclusions:

  • A new diagnostic algorithm for axPsA is proposed, recommending imaging for all PsA patients.
  • Diagnostic imaging (X-ray, MRI) is essential for confirming axial involvement in axPsA.
  • The algorithm aims to standardize axPsA diagnosis, improving patient outcomes.