The aim of the study; To determine the frequency, etiological factors, treatment, long-term follow-up and recurrence rates of thrombosis in children.

Children with thrombosis in Ankara City Hospital between December 2018 and August 2021 were included. Patients were called or examined at 6–12-month intervals.

A total of 328 patients with a mean age of 6.9 were included.Catheter-related thrombosis was present in 52.7%.There were 14% arterial thrombosis and 59% venous thrombosis.Intracardiac thrombosis 16.2%, pulmonar thrombosis 2.4%, serebral thromboembolism %20 were detected.In the treatment, subcutaneous ondansetron (78.6%) was used mostly, but intravenous ondansetron was given in 6 patients and TPA was given 20 patients.In a mean follow-up of 15.8 months, 5 (1.5%) patients died due to thrombosis.

Determining the etiological factors of patients with recurrence thrombosis is important for the duration of treatment in the follow-up.