[Iatrogenic pseudoaneurysm of the brachial artery in a 4-month-old child - a case report].

We present a rare case of an iatrogenic pseudoaneurysm of the brachial artery in a 4-month-old child. As there are reports of such lesions in children that undergo invasive treatment such as sophisticated cardiovascular or radiological interventions and have preexisting risk factors, our patients had no history of vessel caniulation in hospital conditions and no systemic problems. A simple ambulatory blood draw caused a tear in the brachial artery wall, that later formed a pseudoaneurysm, a month before parents suddenly noticed mass on their child's arm. A microsurgical repair was performed. A significant increase in endovascular treatment options has been observed over last decades. Successful treatment was a result of fast radiological diagnostic and effective co-operation between paediatric and general vascular surgeons. Our case should raise awareness of paediatric practitioners about iatrogenic trauma of vessels in the differential diagnosis of tumours and vascular lesions.