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Interleukin-1 receptor antagonist treatment revealed active hepatitis B infection in a boy with PAPA syndrome
© Selmanovic et al. 2015
Published: 28 September 2015
PAPA syndrome (pyogenic sterile arthritis, pyoderma gangrenosum and acne) is a rare autosomal-dominant autoinflammatory disease caused by mutations in PSTPIP1gene. Typically presents with recurrent sterile, erosive arthritis in childhood, occurring spontaneously or after minor trauma, occasionally resulting in significant joint destruction. By puberty, joint symptoms tend to subside and cutaneous symptoms increase. Cutaneous manifestations include pathergy, frequently with abscesses at the sites of injections, severe cystic acne, and recurrent nonhealing sterile ulcers, often diagnosed as PG.
To report a case of hepatitis B infection revealed with interleukin-1 receptor antagonist for PAPA syndrome.
Patient and method
16,5y boy with PAPA syndrome presenting at age 2 with pyogenic sterile arthritis requiring multiple surgeries (shoulders, elbows, knees, ankles, wrists). He was treated as JIA for 14y (NSAID, steroids (11 years, had growth retardation due to steroids), immunosupressants (metotrexate) and for short time biologicals (infliximab, adalimumab). Several years ago developed severe acne and nonhealing skin ulcers. In august 2013, the boy was referred to our Department and completely reevaluated. He had raised inflammatory markers, microcytic anaemia, normal transaminases. Skin biopsy: pyoderma gangrenosum. Kidney biopsy excluded amyloidosis. Started with adalimumab for 1 year. Joint disease was under control, but not skin disease. Clinical diagnosis of PAPA syndrome was confimed by genetic analysis in March 2014. He was heterozygous for the substitution 748G>C in exon 11 that predicts the E250Q aminoacid substitution. When available, adalimumab was switched to anakinra in November 2014 (after washout period of 8 weeks). One month later, the patient showed raised transaminases (10 times above upper limit of normal). Active hepatitis B infection was proved by PCR. His mother had hepatitis B and boy had several surgeries with blood transfusions. How did he harbour the infection? Anakinra was stopped. On symptomatic therapy, transaminasemia soon normalised, but PAPA worsened. At present, he is on antiviral therapy and the issue if and when anakinra should be restarted.
We reported a boy with genetically confirmed PAPA syndrome. Treatment with adalimumab controlled joint but not skin disease. Interleukin-1 receptor antagonist was associated with activation of previously unknown hepatitis B infection, requiring antiviral therapy and withdrawal of treatment with anakinra. This case raises the question of the possible role of anakinra in activating the viral infection and the usefullness routine srceening for hepatitis B prior biological.
Consent to publish
Written informated consent for publication of their clinical details was obtained from the patient/parent/guardian/relative of the patient.
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