Shunt implantation in utero being a life-saving procedure, may be connected with a wide range of complications. One of them is catheter dislocation, a side effect which may impair the state of the fetus and child. We present a case of a boy with Congenital Adenomatoid Lung Malformation (CALM) type II. Invasive prenatal therapy, complicated by shunt migration did not influence our patient’s health. Moreover, the abnormally located shunt stayed within the child’s chest up to the age of 6 years. No symptoms linked to foreign body presence were observed. Although similar cases were published, we report a situation, in which the catheter was left in the patient’s body for 6 years, for the first time.