Case report: a rare mediastinal neuroblastoma in an adult associated with syndrome of inappropriate secretion of antidiuretic hormone (SIADH)

Abstract

Neuroblastoma is an embryonic cancer arising from neural crest stem cell and almost exclusively a pediatric neoplasm. In adults, neuroblastoma is rare and presents worse prognosis compared to children. The most common presentation of this neoplasia is a painless abdominal mass. Other signs and symptoms can be related to mass effect from the primary tumor or as a result of metastatic disease, or paraneoplastic syndromes. There are no well-established treatment guidelines for adults with neuroblastoma. In general, the principle of treatment is determined by risk assessment system, using a multimodal treatment (surgery, chemotherapy, and radiotherapy) based on treatment protocols for this neoplasm in children. This case report refers to the diagnosis of neuroblastoma in mediastinum in a 52-year-old woman with locally advanced disease and not able to be removed to diagnosis, accompanied by hyponatremia as paraneoplastic syndrome, which presented a good response to the treatment established.

Keywords

• neuroblastoma
• mediastinal neoplasms
• adult.