[Management and description of neonatal tumours in a surgical oncology unit].

Aim: Neonatal tumours represents less than 2% of all childhood cancers. The biological behaviour of this tumours will differ in older children. The tumours's biological differences and the immature physiological characteristics of newborns represent a great therapeutically challenge making newborns vulnerable. The aim of this study is to describe the clinical characteristics, associated malformations, diagnostic methods, treatment and the outcomes of neonatal tumours.

Methods: Retrospective review of patients ≤ 28 days-old with diagnosis of neonatal tumour between 2000-2016. Statistical analysis of clinical characteristics, histology, diagnostic methods, treatment and morbimortality.

Results: A total of 26 tumours were diagnosed in newborns with a mean age of 4.85 ± 8.9 days and 69.2% of boys. Prenatal diagnosis was achieved in 38.5% (n = 10) and 38.5% (n = 10) in the first week of age. Associated malformations were found in 30.6% (n = 8). The most frequent tumours were hepatic hemangioma 23.1% (n = 6), neuroblastoma 15.4% (n = 4) and sacrococcygeal teratoma 11.5% (n = 3). Medical treatment was indicated in 7.7% (n = 5), surgical 57.7% (n = 15) and observation 30.8% (n = 7). Global mortality was 19.23% (n = 5) of which 42.9% (n = 3/7) were perioperatively.

Conclusions: The management of neonatal tumours require a multidisciplinary approach to minimize the consequences and assure the best outcome. Global mortality is low and depends primarily of the physiologic and association of other malformations of the newborn.