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and father with systemic lupus erythematosus &#40;SLE&#41;&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">Her symptoms started with xerophthalmia &#40;red eye&#44; stinging sensation and ocular lacrimation&#41; associated with xerostomia &#40;drinking more than 3&#160;l of water per day&#44; including night waking&#41; and occasional mouth ulcers&#46; She reported intermittent polyarthralgia&#44; without oedema or stiffness&#46; No history of parotitis or Raynaud&#8217;s phenomenon&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">On examination&#44; she presented dysmorphic features typical of KS&#44; joint hypermobility without arthritis&#44; cutaneous xerosis&#44; cracked tongue and impalpable salivary glands&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">Laboratory tests reported normal haemogram&#44; elevated amylase&#44; ANA 1&#47;1000 with speckled pattern&#44; positive anti-SSa&#44; normal complement and mild hypergammaglobulinaemia&#46; Inflammatory markers&#44; urinary sediment and the remaining immunological study were normal&#46; Salivary gland ultrasound &#40;SGUS&#41; showed normal dimensions&#44; heterogeneous parenchyma&#44; and hypoechoic areas&#44; compatible with jSS&#46; Biopsy of the minor salivary glands was normal&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">She was observed by the ophthalmology department who confirmed keratoconjunctivitis sicca&#44; with positive Schirmer test and Ocular Staining Score &#8805;5&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">Due to transient liver function elevation&#44; she underwent a liver autoimmunity panel&#44; which was negative&#46; The elevated liver function in this syndrome could be due to autoimmune hepatitis or primary biliary cirrhosis&#44; and was therefore excluded&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">She started treatment with general measures for xerostomia and oral hygiene&#44; ocular lubrication&#44; and skin hydration&#46; During follow-up she developed mild photosensitive malar erythema&#46; Due to the risk of overlap with SLE and mild systemic manifestations &#40;arthralgias and hypergammaglobulinaemia&#41;&#44; treatment was started with hydroxychloroquine 4&#160;mg&#47;kg&#47;day&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">We now know that SS is an autoimmune disease characterised by T-lymphocyte infiltration at the level of the exocrine glands&#46; This infiltration leads to destruction of the exocrine glands and the onset of symptoms related to dryness of the infiltrated mucous membranes&#46; Up to one third of patients may present with more active and severe extraglandular manifestations that affect long-term prognosis<a class="elsevierStyleCrossRefs" href="#bib0010"><span class="elsevierStyleSup">2&#8211;4</span></a>&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">In children SS is rarely primary&#44; as in our case&#44; and therefore close monitoring is essential in this type of patient due to the risk of overlap with another connective tissue disease<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a>&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">There are currently no diagnostic criteria for SS in the paediatric age group&#59; adult criteria depend too much on evidence of glandular dysfunction&#44; which takes time to develop and is less evident during childhood&#46; Biopsy at this age has a low sensitivity due to the small size of the glands&#44; diagnostic difficulty and being able to biopsy an area that is normal<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a>&#46; Nevertheless&#44; our patient meets the 2016 ACR&#47;EULAR criteria<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a>&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall">There are international groups that are working on diagnostic criteria for SS adapted to the paediatric age group&#46; Since we know that recurrent mumps is the most typical form of presentation in this age group&#44; including this entity in these criteria seems to increase diagnostic sensitivity for jSS&#46; It is possible that the combination of salivary gland inflammation &#40;clinical or subclinical parotitis&#44; SGUS or histopathology changes&#41; and positive autoantibody may be sufficient to diagnose SS in a child&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">If there are suggestive symptoms&#44; patients with KS should always be thoroughly assessed for autoimmune disorders&#46; This is the first case described in the literature of both syndromes&#46;</p></span>"
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Journal Information
Vol. 18. Issue 8.
Pages 498-499 (October 2022)
Vol. 18. Issue 8.
Pages 498-499 (October 2022)
Letter to the Editor
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Kabuki syndrome with Sjögren Syndrome: First case reported
Síndrome de Kabuki con síndrome de Sjögren: primer caso descrito
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Cristina Ferrerasa,b,
Corresponding author
cristinaferreras87@gmail.com

Corresponding author.
, Francisca Aguiarb,c, Mariana Rodriguesb,c, Iva Britob,c
a Departamento de Pediatría, Centro Hospitalar Universitário de São João, Porto, Portugal
b Facultad de Medicina, Universidad de Porto, Porto, Portugal
c Unidad de Reumatología Pediátrica y Joven Adulto, Centro Hospitalar Universitário de São João, Porto, Portugal
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Dear Editor,

Kabuki syndrome (KS) is a genetic syndrome characterised by typical facial features (palpebral fissures with inverted lower eyelids, arched eyebrows, depressed nasal tip), musculoskeletal abnormalities (brachydactyly, clinodactyly of the fifth digits and spine abnormalities), abnormal epidermal ridges, short stature, and intellectual deficit1.

Although the association between KS and autoimmune disease is well documented, probably due to mutations in the dysregulation of lymphocyte differentiation2,3, this is the first reported case of association with primary juvenile Sjögren’s syndrome (jSS).

We present the case of a 9-year-old Caucasian girl diagnosed with KS (15654C>G mutation in exon 48 of gene KMT2B) and father with systemic lupus erythematosus (SLE).

Her symptoms started with xerophthalmia (red eye, stinging sensation and ocular lacrimation) associated with xerostomia (drinking more than 3 l of water per day, including night waking) and occasional mouth ulcers. She reported intermittent polyarthralgia, without oedema or stiffness. No history of parotitis or Raynaud’s phenomenon.

On examination, she presented dysmorphic features typical of KS, joint hypermobility without arthritis, cutaneous xerosis, cracked tongue and impalpable salivary glands.

Laboratory tests reported normal haemogram, elevated amylase, ANA 1/1000 with speckled pattern, positive anti-SSa, normal complement and mild hypergammaglobulinaemia. Inflammatory markers, urinary sediment and the remaining immunological study were normal. Salivary gland ultrasound (SGUS) showed normal dimensions, heterogeneous parenchyma, and hypoechoic areas, compatible with jSS. Biopsy of the minor salivary glands was normal.

She was observed by the ophthalmology department who confirmed keratoconjunctivitis sicca, with positive Schirmer test and Ocular Staining Score ≥5.

Due to transient liver function elevation, she underwent a liver autoimmunity panel, which was negative. The elevated liver function in this syndrome could be due to autoimmune hepatitis or primary biliary cirrhosis, and was therefore excluded.

She started treatment with general measures for xerostomia and oral hygiene, ocular lubrication, and skin hydration. During follow-up she developed mild photosensitive malar erythema. Due to the risk of overlap with SLE and mild systemic manifestations (arthralgias and hypergammaglobulinaemia), treatment was started with hydroxychloroquine 4 mg/kg/day.

We now know that SS is an autoimmune disease characterised by T-lymphocyte infiltration at the level of the exocrine glands. This infiltration leads to destruction of the exocrine glands and the onset of symptoms related to dryness of the infiltrated mucous membranes. Up to one third of patients may present with more active and severe extraglandular manifestations that affect long-term prognosis2–4.

In children SS is rarely primary, as in our case, and therefore close monitoring is essential in this type of patient due to the risk of overlap with another connective tissue disease5.

There are currently no diagnostic criteria for SS in the paediatric age group; adult criteria depend too much on evidence of glandular dysfunction, which takes time to develop and is less evident during childhood. Biopsy at this age has a low sensitivity due to the small size of the glands, diagnostic difficulty and being able to biopsy an area that is normal5. Nevertheless, our patient meets the 2016 ACR/EULAR criteria6.

There are international groups that are working on diagnostic criteria for SS adapted to the paediatric age group. Since we know that recurrent mumps is the most typical form of presentation in this age group, including this entity in these criteria seems to increase diagnostic sensitivity for jSS. It is possible that the combination of salivary gland inflammation (clinical or subclinical parotitis, SGUS or histopathology changes) and positive autoantibody may be sufficient to diagnose SS in a child.

If there are suggestive symptoms, patients with KS should always be thoroughly assessed for autoimmune disorders. This is the first case described in the literature of both syndromes.

References
[1]
N. Niikawa, Y. Kuroki, T. Kajii, N. Matsuura, S. Ishikiriyama, H. Tonoki, et al.
Kabuki make-up (Niikawa-Kuroki) syndrome: a study of 62 patients.
Am J Med Genet, 31 (1988), pp. 562-569
[2]
S. Stagi, A.V. Gulino, E. Lapi, A. Rigante.
Epigenetic control of the immune system: a lesson from Kabuki syndrome.
Immunol Res, 64 (2016), pp. 345-359
[3]
J.D. Hoffman, K.L. Ciprero, K.E. Sullivan, P.B. Kaplan, D.M. McDonald-McGinn, E.H. Zackai, et al.
Immune abnormalities are a frequent manifestation of Kabuki syndrome.
Am J Med Genet A, 135 (2005), pp. 278-281
[4]
T. Arsov, M. Sestan, N. Cekada, M. Frkovic, D. Andrews, Y. He, et al.
Systemic lupus erythematosus: a new autoimmune disorder in Kabuki syndrome.
Eur J Med Genet, 62 (2019),
[5]
P. Gómez, J.P. Rojas.
Síndrome de Sjögren en pediatría: diagnóstico y manejo.
Rev Colomb de Reumatol, 19 (2012), pp. 245-250
[6]
C.H. Shiboski, S.C. Shiboski, R. Seror, L.A. Criswell, M. Labetoulle, T. Lietman, et al.
2016 American College of Rheumatology/European League Against Rheumatism Classification Criteria for Primary Sjögren’s Syndrome: a consensus and data-driven methodology involving three international patient cohorts.
Arthritis Rheumatol, 69 (2017), pp. 35-45

Please cite this article as: Ferreras C, Aguiar F, Rodrigues M, Brito I. Síndrome de Kabuki con síndrome de Sjögren: primer caso descrito. Reumatol Clín. 2022;18:499–500.

Copyright © 2021. Elsevier España, S.L.U. and Sociedad Española de Reumatología y Colegio Mexicano de Reumatología
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