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Reumatologia/Rheumatology
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4/2021
vol. 59
 
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Artykuł oryginalny

Follow-up and management of serologically active clinically quiescent cases in pediatric systemic lupus erythematosus

Gabrielle Capone
1
,
Caroline Lojacono
1
,
Fatma Al-Bayitee
1
,
Shayan Makvandi
1
,
Teresa Hennon
1
,
Brian Wrotniak
1
,
Rabheh Abdul-Aziz
1

1.
Department of Pediatric Rheumatology, University at Buffalo, United States
Reumatologia 2021; 59, 4: 244–251
Data publikacji online: 2021/08/13
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Introduction
Our aim is to identify the presence of serologically active clinically quiescent (SACQ) episodes in pediatric systemic lupus erythematosus (SLE) patients. We aim to identify serologic biomarkers associated with SACQ episodes and discuss risks and benefits of escalating treatments.

Material and methods
We evaluated 25 pediatric SLE patients, 13 of whom experienced SACQ epis­odes. Serologically active clinically quiescent was defined as two consecutive clinic visits without any clinical symptoms or clinical examination findings of a lupus flare with a clinical Systemic Lupus Erythematosus Disease Activity Index 2000 (SLEDAI-2K) score of zero, but either elevated anti-ds-DNA antibodies or low complement (C3 and/or C4) levels.

Results
Among the 13 patients who experienced a SACQ episode, there were a total of 24 episodes, with each patient experiencing 1–4 SACQ episodes. Erythrocyte sedimentation rate (ESR) was the most commonly elevated laboratory marker in a SACQ episode, followed by low hemoglobin levels, and then elevated anti-dsDNA antibodies. Of the 17 episodes treated during a SACQ episode, 15 (88%) did not progress to a clinical flare within six months, while two did. Furthermore, of the 7 patients who were not treated during their SACQ episode, 2 (29%) continued to be SACQ without flare, whereas 5 led to a clinical flare within six months.

Conclusions
Serologically active clinically quiescent episodes were identified in pediatric SLE patients, suggesting that the presence of SACQ is not limited to adults with SLE. Serologic markers such as increased ESR, hemoglobin, and elevated anti-dsDNA antibodies are preliminarily associated with pediatric SACQ episodes. Treating these SACQ episodes in pediatric SLE patients was less likely to lead to a clinical flare within six months when compared to not treating (p < 0.05). More research with a larger sample size is needed to define SACQ episodes, determine the prevalence in pediatric SLE patients, and establish SACQ treatment guidelines.







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