PubMed Abstracts:

Anti-Saccaromyces Cerevisiae antibodies (ASCA) are elevated in autoimmune thyroid disease ASCA in autoimmune thyroid disease. 
PMID: 21046480
  July 2010
Autoimmune thyroiditis has increased prevalence in patients with celiac disease and vice versa. new research suggests that serum transglutaminase 2 autoantibodies, which are present in patients with celiac disease, might have a role in the development of thyroid dysfunction.
PMID: 19352315  April 2009
Conclusions: Anti-TGase II antibodies bind to TGase II in thyroid tissue, and titers correlate with TPO antibody titers. These findings suggest that anti-TGase II antibodies could contribute to the development of thyroid disease in celiac disease.
PMID: 19014325  Nov 2008
Conclusion: Celiac disease is associated with thyroid disease and these associations were seen regardless of temporal sequence. This indicates shared etiology and that these individuals are more susceptible to autoimmune disease.
CONCLUSION: Asymptomatic CD may be the underlying cause for some cases of normocalcemic primary hyperparathyroidism, and it should be considered in this setting.
PMID: 18463042  April 2008

CONCLUSIONS: CD is significantly increased in patients with thyroid autoimmune disorders for this reason it is important to screen for CD in patients with AITDs.

CONCLUSION: The data from a Dutch population confirm the association between Hashimoto's thyroiditis and coeliac disease. Screening patients with Hashimoto's thyroiditis for coeliac disease and vice versa is recommended.
Coeliac disease in Dutch patients with Hashimoto's thyroiditis and vice versa.
PMID: 17461476 Mar 2007

CONCLUSION: Turkish patients with autoimmune thyroiditis have an increased risk of coeliac disease and serological screening may be useful for early detection of coeliac disease in these patients. Our findings need to be confirmed in a larger series of patients.

Other medical history included autoimmune disease (n = 20; particularly Hashimoto's thyroiditis, Graves' disease and coeliac disease), postpartum (n = 8) and gastrointestinal (n = 2) haemorrhage and hyperprolactinaemia (n = 13). 31 subjects had peak cortisol levels of <500 nM (suggestive of ACTH deficiency; 18 of whom had levels < 400 nM) and a further six had indeterminate results (500-550 nM).
Evaluation of pituitary function in the fatigued patient: a review of 59 cases.
PMID: 16382004 Jan 2006

Antibody screening for coeliac disease should be included in the work-up of patients with autoimmune thyroiditis
Coeliac disease in patients with autoimmune thyroiditis.
PMID: 11549838

The greater frequency of thyroid disease among celiac disease patients justifies a thyroid functional assessment. In distinct cases, gluten withdrawal may single-handedly reverse the abnormality.
Prevalence of thyroid disorders in untreated adult celiac disease patients and effect of gluten withdrawal: an Italian multicenter study.
PMID: 11280546

On gluten-free diet an excellent clinical and histological response was recorded with an improvement of hypothyroidism and reduction of the thyroxine dosage. Our data suggest a significant high prevalence (3.3%) of CD in patients with ATD, in particular with Hashimoto's thyroiditis.
Prevalence of coeliac disease in patients with thyroid autoimmunity.
PMID: 10461017

These results show that the prevalence of coeliac disease in patients with autoimmune thyroid diseases is significantly increased when compared with the general. We suggest a serological screening for coeliac disease in all patients with autoimmune thyroid disease measuring anti-endomysial antibodies, considering that early detection and treatment of coeliac disease are effective in preventing its complications.
Prevalence and early diagnosis of coeliac disease in autoimmune thyroid disorders.
PMID: 10425571

After 18 months on gluten-free diet, the anti-thyroid antibodies titre decreased significantly, and we could discontinue thyroid substitutive therapy.
Unusual association of thyroiditis, Addison's disease, ovarian failure and celiac disease in a young woman.
PMID: 10401714

Moreover, untreated patients with celiac disease have been found to have a higher than expected prevalence of organ-specific autoantibodies. In a prospective study of 90 patients with celiac disease, we found that the prevalence of diabetes and thyroid-related serum antibodies was 11.1% and 14.4%, respectively. Like antiendomysium autoantibodies, these organ-specific antibodies seem to be gluten-dependent and tend to disappear during a gluten-free diet.
Gluten-dependent diabetes-related and thyroid-related autoantibodies in patients with celiac disease.
PMID: 10931424

A significant proportion of patients with Hashimoto's thyroiditis present signs of 'potential' CD and of activated mucosal T cell immunity. The gluten dependence of such findings remains to be ascertained.
Markers of potential coeliac disease in patients with Hashimoto's thyroiditis.
PMID: 11916614

In conclusion, the occurrence of both clinical and subclinical autoimmune thyroid disease was increased in celiac disease; subclinical thyroid disease indicates regular surveillance.
Clinical and subclinical autoimmune thyroid disease in adult celiac disease
PMID: 11768252

Screening for celiac disease is recommended in children with autoimmune thyroid disease.
Celiac disease in children with autoimmune thyroid disease.
PMID: 11713456

The high frequency of autoimmune thyroid disease found among patients with CD, even those on a gluten-free diet, may justify a thyroid status assessment at diagnosis and at follow-up evaluation of children with CD.
Autoimmune thyroid disease and celiac disease in children.
PMID: 12827007

Screening for autoimmune thyroiditis and celiac disease should be performed in patients with type 1 diabetes and their first-degree relatives, especially when the probands have an additional autoimmune manifestation.
Extrapancreatic autoimmune manifestations in type 1 diabetes patients and their first-degree relatives: a multicenter study.
PMID: 12663603

Because minor forms of gluten-induced enteropathy are not rare in patients with thyroid autoimmune diseases, the cost-effectiveness of using antigliadin antibodies as a first-line test (instead of an LT(4) loading test) in patients requiring daily doses of levothyroxine above 2 microg per kg of body weight, whatever their age may be, is discussed.
Gluten-induced enteropathy (coeliac disease) revealed by resistance to treatment with levothyroxine and alfacalcidol in a sixty-eight-year-old patient: a case report.
PMID: 12193310