Data set for reporting of peripheral neuroblastic tumours: recommendations from the international collaboration on cancer reporting (ICCR).

Peripheral neuroblastic tumours are the most common extracranial solid neoplasms occurring in children. Proper classification is critical for directing therapy and predicting prognosis. Nonetheless, their relative rarity makes accurate pathological assessment challenging, even for experienced pathologists. Here we report on a new international data set for the pathology reporting of biopsy and resection specimens with peripheral neuroblastic tumours. The data set was produced under the auspices of the International Collaboration on Cancer Reporting (ICCR), a global alliance of major (inter-)national pathology and cancer organisations. According to the ICCR's process for data set development, an international expert panel consisting of paediatric pathologists and oncologists produced a set of core and non-core data items for biopsy and resection specimens based on a critical review and discussion of current evidence. All professionals involved were neuroblastic tumour experts affiliated with tertiary referral centres. Commentary was provided for each data item to explain the rationale for selecting it as a core or non-core element, its clinical relevance and to highlight potential areas of disagreement or lack of evidence, in which case a consensus position was formulated. Following international public consultation, the documents were finalised and ratified, and the data sets, including a synoptic reporting guide, were published on the ICCR website. This first international data set for paediatric peripheral neuroblastic tumours is intended to promote high-quality, standardised pathology reporting. Its widespread adoption will improve the consistency of reporting, facilitate multidisciplinary communication and enhance comparability of data, all of which will help to improve management of children with peripheral neuroblastic tumours.