Five cases included in this report have been previously reported: one as a case of imatinib-resistant, sunitinib-responsive DTF [38], two as cases of DTF that tracked along nerves appearing as multifocal DTF despite being a single contiguous lesion [49], one as a case of unusual multifocal recurrence [49], and one as a DTF in which CTNNB1 analysis suggested a large proportion of the DTF appearing cells in the tumor were derived from myofibroblasts with no CTNNB1 mutation [50]. This evidence concerns the gene CTNNB1 and neoplasm.