“…2,21,22 In recent years, minimally invasive techniques have been widely used to establish a diagnosis, for staging purposes, and for evaluation of recurrent or metastatic disease in children. 3,4,23 The spectrum of malignancies included the whole range of pediatric abdominal, retroperitoneal, and thoracic tumors, such as neuroblastoma, nephroblastoma, hepatoblastoma, rhabdomyosarcoma, teratoma, lymphoma, and numerous others. 3,4,8,13,[23][24][25][26] The conversion rate was less than 5%, the diagnostic accuracy of biopsies was up to 100%, and there were no major intra-or postoperative complications.…”