Primary malignant tumors with abdominal location in children (neuroblastoma and nephroblastoma) – clinical case report and literature review

Primary malignant tumors with multiple localization are insufficiently discussed in modern pediatric oncology. Re­cent research reveals that the presence of two or more in­de­pen­dent malignant tumor formations in a single pa­tient and diagnosed simultaneously or sequentially are called multiple primary tumors, and each tumor does not show an extension, or recurrence, or metastasis of the other. Based on classification, multiple primary ma­lig­nant tumors are subdivided, according to their onset, into synchronous and metachronous. We report the case of a male patient, 3 years and 6 months old, diagnosed with both neuroblastoma and nephroblastoma. This is one of the rare cases that require not only an early diagnosis but also a meticulous surgical technique in op­ti­mal conditions, with the excision of all tumor elements.