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Thyroid autoimmunity in children with coeliac disease: a prospective survey
  1. Antonella Diamanti1,
  2. Francesca Ferretti1,
  3. Rinaldo Guglielmi2,
  4. Fabio Panetta1,3,
  5. Franco Colistro4,
  6. Marco Cappa5,
  7. Antonella Daniele1,
  8. Maria Sole Basso1,
  9. Cristian Noto1,
  10. Massimo Crisogianni6,
  11. Massimo Castro1
  1. 1Gastroenterology and Nutrition Unit, Pediatric Hospital ‘Bambino Gesù’, Rome, Italy
  2. 2Endocrinology and Metabolic Diseases Department, ‘Regina Apostolorum’ Hospital, Albano Laziale, Rome, Italy
  3. 3University Hospital ‘G Martino’, Messina, Italy
  4. 4Biochemistry Laboratory, Pediatric Hospital ‘Bambino Gesù’, Rome, Italy
  5. 5Endocrinology Unit, Pediatric Hospital ‘Bambino Gesù’, Rome, Italy
  6. 6Emergency Department, Pediatric Hospital ‘Bambino Gesù’, Rome, Italy
  1. Correspondence to Dr Antonella Diamanti, Gastroenterology and Nutrition Unit, Pediatric Hospital ‘Bambino Gesù’, Piazza S Onofrio 4, 00165 Rome, Italy; diamanti{at}opbg.net

Abstract

Background Thyroid autoimmunity (TA) is often associated with coeliac disease (CD).

Objective To evaluate, in children and adolescents with CD on a gluten-free diet (GFD): (1) the prevalence of TA; (2) the impact of TA on growth and the need for L-thyroxine (L-T4) treatment, during a longitudinal survey.

Method Between January and December 2005, 545 patients with CD, prospectively followed up until December 2007, and 622 controls were screened for TA. Antithyroperoxidase and antithyroglobulin antibodies were assayed and, if positive, serum free tri-iodothyronine, free thyroxine and thyroid-stimulating hormone (TSH) assays and thyroid ultrasound were performed. L-T4 was started if TSH was >5.5 mU/ml at two successive measurements.

Results There was no significant difference in TA prevalence between patients with CD on a GFD (10%) and controls (8.2%). Duration of GFD differed significantly in coeliac patients with TA in comparison with those without TA (7.9±0.9 and 10.2±0.3 years, p<0.001), but no significant difference was found for weight and height gain (1.8±1.0 vs 3.7±1.5 and 2.1±1.2 kg/year vs 4.0±1.1 cm/year, respectively). At the end of the follow-up an increase of 7% in the prevalence of patients with CD with TA requiring L-T4 was found.

Conclusions TA seems no more common in paediatric and adolescent patients with CD on a GFD than in controls; its clinical evolution does not seem to impact on growth. Therefore, a long-term regular screening programme for thyroid disease may not be necessary for all patients with CD on a GFD, but only for those who are suspected of having thyroid diseases.

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Footnotes

  • Competing interests None.

  • Ethics approval Our study was approved by the ethics committee of our hospital and informed consent was requested and obtained from parents/guardians and/or patients and control subjects.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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