The complication of deep vein thrombosis — a case report of an adolescent with catheter-related thrombosis due to treatment of congestion of caustic substance at the age of 2, treated with stent implantation after 14 years

Introduction: Deep vein thrombosis (DVT) is a type of venous thromboembolism, which is a global problem that affects not only adults but also children. Many risk factors are known; inherited or acquired ones caused by sepsis, malignancy, total parenteral nutrition, smoking, medications, or central venous line. Case presentation: The case report presents a complicated medical history of a patient with long-term secondary DVT, finally treated with stent implantation at the age of 16. At the age of 2, he congested a caustic substance, and the treatment resulted in catheter-related thrombosis. Primarily, pharmacological treatment was ineffective. Only after 14 years, subsequently, many treatment attempts, balloon angioplasty, and stent implantation in the left external iliac vein and left common iliac vein were performed successfully via puncture of the right common jugular vein and common femoral veins. The patient was asymptomatic and regularly attended follow-up visits and also control computed tomography venography was performed two times. Conclusions: This case report shows the successful management of DVT in a pediatric patient. In addition, the importance of a holistic approach and observation due to still unknown long-term complications should be emphasized.