DISCUSSION: Venous thromboembolism (VTE) includes both deep vein thrombosis (DVT) and pulmonary embolism (PE). Over last decade, bedside genetic abnormality and malignancy, multiple risk factors have been shown to be associated with venous thromboembolism. Hyperthyroidism, is one such association. A recent prospective study from taiwan, involving 53,418 patients has established a 2.3 time increased risk of VTE in patients with a decreased TSH over a 5 year period after adjusting for confounding variables. There have been scattered reports of VTE associated with patients in a clinical thyroid storm, however, these are seen as complications of the thyroid disease and not a silent association. The exact pathogenesis of pulmonary embolism in hyperthyroidism is not known.