In 1865, Trousseau remarked that there was a possibility for an unforeseen or mobile thrombophlebitis to be a sign of an occult visceral malignancy. Trousseau's syndrome is often a comorbid of mucin-positive carcinomas in patients who have cancer and it includes chronic disseminated intravascular coagulopathy associated with microangiopathy, verrucous endocarditis and arterial emboli. 86 year old male patient who had a prostate cancer for 6 years came to our emergency department with a complaint of not being able to use his right hand. We founded that there was diffusion limitation in MR diffusion and cerebrovascular disease was diagnosed by MR diffusion. There was R segment losses in the inferior and anteroseptal leads of patients' ECG, had a QS pattern in the inferior leads. Serum samples had high levels of troponin. His treatment was started with 300 mg of acetylsalicylic acid and medical treatments were added. For patients who have had malignancy diagnosis, Trousseau's syndrome should be kept in mind and doctors should be alert for thrombotic events that may develop secondarily.