Maternal Thyroid Disease and the Risk of Childhood Cancer in the Offspring

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Seppälä, L.K.; Madanat-Harjuoja, L.-M.; Leinonen, M.K.; Lääperi, M.; Vettenranta, K. Maternal Thyroid Disease and the Risk of Childhood Cancer in the Offspring. Cancers 2021, 13, 5409.

Titel: Maternal Thyroid Disease and the Risk of Childhood Cancer in the Offspring
Författare: Seppälä, Laura K.; Madanat-Harjuoja, Laura-Maria; Leinonen, Maarit K.; Lääperi, Mitja; Vettenranta, Kim
Utgivare: Multidisciplinary Digital Publishing Institute
Datum: 2021-10-28
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Abstrakt: Maternal thyroid disease, especially hypothyroidism, affects pregnancy and its outcome. In-utero exposure to autoimmune thyroid disease has been reported to associate with childhood ALL in the offspring. We evaluated the risk of childhood cancer in the offspring following exposure to maternal thyroid disease in a case-control setting using registry data. All patients with their first cancer diagnosis below the age of 20 years were identified from the Finnish Cancer Registry (<i>n</i> = 2037) and matched for sex and birth year at a 1:5 ratio to population controls identified from the Medical Birth Registry (<i>n</i> = 10,185). We collected national information on maternal thyroid disease from the Medical Birth Registry, Care Register for Health Care, Register for Reimbursed Drug Purchases and Register of Special Reimbursements. We used conditional logistic regression to analyze childhood cancer risk in the offspring. The adjusted OR for any childhood cancer was 1.41 (95%, CI 1.00–2.00) comparing the offspring of mothers with hypothyroidism and those with normal thyroid function. The risk of lymphomas was increased (adjusted OR for maternal hypothyroidism 3.66, 95%, CI 1.29–10.38). The results remained stable when mothers with cancer history were excluded from the analyses. Maternal hypothyroidism appears to be associated with an increased risk for childhood lymphoma in the offspring. The association exists even after excluding possible familial cancers.

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