RT Journal Article SR Electronic T1 Neurofibroma in the retroperitoneum associated with neurofibromatosis type 1 JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e244364 DO 10.1136/bcr-2021-244364 VO 14 IS 11 A1 Saito, Hiroaki A1 Suda, Tsuyoshi A1 Kobayashi, Masako A1 Matsushita, Eiki YR 2021 UL http://casereports.bmj.com/content/14/11/e244364.abstract