Gillingham, Jacob

e23544 Background: Rare diseases are defined as conditions that affect less than 200,000 people annually in the United States. Around 17000 cases of sarcoma will be diagnosed in 2020. Collaboration among institutions is needed to best understand rare diseases such as sarcoma. One measure of collaboration is publications with multiple institutions as authors. We sought to determine if collaboration in sarcoma has increased since 2011 and compared that to another rare disease, CNS tumors based on multi-institution-authored abstracts presented at ASCO. Methods: All sarcoma and CNS oral abstracts, clinical science symposia, poster presentations, poster discussions, and published-only ASCO Annual Meetings from 2011 to 2019 were reviewed. Collaboration was determined if the abstract authors were from more than one institution. Results: 2,134 abstracts were reviewed. Collaboration for sarcoma ranged from 0.603 to 0.720 and 0.582 to 0.755 for CNS. From 2011-2019 a positive linear trend in collaboration was found in CNS (P < 0.05), but not in sarcoma (P = NS). There was no significant trend in the incidence of collaboration in Sarcoma based on the type of presentation at ASCO. There was no difference in collaboration between bone or soft tissue sarcoma abstracts or median number of institutions collaborating between sarcoma and CNS. There were more international collaborations and absolute number of institutions in sarcoma vs CNS. Conclusions: Sarcoma collaboration has remained constant from 2011-2019 with greater number of institutions and more international collaborations as compared to CNS. CNS collaboration has increased from 2011-2019. Sarcoma collaboration at ASCO is robust and reflects the need for multi-institutional partnership.