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Peritenon Extensor Tendon Inflammation in Psoriatic Arthritis Is an Enthesitis-related Lesion

Cristina Macía-Villa^1,2, Sandra Falcao^3,4, Marwin Gutierrez^3,4

¹From the Department of Rheumatology, Hospital Universitario Severo Ochoa, Madrid; Department of Rheumatology, Hospital Clínico Universitario, Valladolid; Department of Rheumatology, Hospital Universitario La Paz, Madrid, Spain; Department of Rheumatology, Chronic Diseases Study Center (CEDOC), NOVA Medical School, Universidade Nova de Lisboa (UNL), Lisbon; Centro Hospitalar de Lisboa Occidental, Lisbon, Portugal; Division of Musculoskeletal and Rheumatic Disorders, Instituto Nacional de Rehabilitación, Mexico City, Mexico; Department of Rheumatology, Diakonhjemmet Hospital, Oslo, Norway. ccmacia@gmail.com.

The Journal of Rheumatology

|February 3, 2019

Abstract

Objective:

To analyze the association between enthesitis, synovitis, and peritenon extensor tendon inflammation (PTI) in psoriatic arthritis (PsA).

Methods:

PsA patients with swelling of metacarpophalangeal joints were included. Greyscale and power Doppler (PD) were used for synovitis and PTI ultrasound identification. Madrid Sonographic Enthesis Index (MASEI) was used for enthesitis assessment. PD activity was evaluated using PD item of MASEI and PD Outcome Measures in Rheumatology (OMERACT) definition.

Results:

Synovitis had no association with enthesitis. PTI was associated with PD MASEI and PD OMERACT. Only PD OMERACT showed a positive correlation with PTI.

Conclusion:

In PsA, PTI is associated to enthesitis, as opposed to synovitis.

Keywords:

ENTHESIS PSORIATIC ARTHRITIS SYNOVITIS TENDON ULTRASOUND

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