Hereditary Risk Factors for Thyroid Cancer

Thyroid cancers can occur sporadically, but can also be found as tumors that cluster in families with other cancers or genetic syndromes. Researchers are studying thyroid cancer in children and families, with a particular interest in understanding genes and other factors that may put individuals at risk for developing thyroid cancer and thyroid nodules. * In this study, family and medical history information is collected alongside a blood or saliva sample for genetic studies. * Individuals with a past or present childhood thyroid cancer/nodule or a thyroid cancer suspected to be inherited in their family are invited to participate.

Inclusion Criteria: * Individual pediatric patient with current or previous known or suspected thyroid cancer or nodule(s). * Individual adult patient with current or previous known or suspected thyroid cancer or nodule(s) if they come from a family with a high suspicion of hereditary cancer (as below). * Individuals from families with a high suspicion of hereditary thyroid cancer: * Families with a current or previous diagnosis of a thyroid cancer/nodule occurring in childhood (\