RT Journal Article SR Electronic T1 Thrombocytopaenia and thyroiditis: coincidence? JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e228411 DO 10.1136/bcr-2018-228411 VO 12 IS 7 A1 Sara Fonseca A1 Catarina Lacerda A1 Ines Ganhão A1 Sofia Castro YR 2019 UL http://casereports.bmj.com/content/12/7/e228411.abstract AB Thrombocytopaenia can be associated with an autoimmune mechanism. Immune thrombocytopaenia can be associated with thyroid autoimmune disease. The authors present a case of a teenager with a history of thrombocytopaenia who complained of tiredness. Laboratory investigation showed thyroid autoantibodies. The co-existence of thrombocytopaenia and thyroiditis lead to further investigation and antibodies against platelet glycoprotein IIbIIIa were found. This case illustrates the association of the overlap aspects between thyroid and platelet autoimmunity.