Sarcoidosis is a disease characterised by a highly variable clinical course. While it may be accompanied by various immune disorders, it is rarely accompanied by disorders of the haematopoietic system. We report a case of sudden-onset primary immune thrombocytopenia co-existing with sarcoidosis. The prevalence of primary immune thrombocytopenia in patients with sarcoidosis is estimated at about 2% and about 1% of patients with thrombocytopenia are diagnosed with sarcoidosis. Three potential pathomechanisms leading to the development of thrombocytopenia in sarcoidosis have been described, namely: (1) the presence of antiplatelet antibodies, (2) presence of epithelioid cell granulomas in the bone marrow and (3) hypersplenism.