“…For their many remarkable characteristics, fractional models have been increasingly chosen and successfully applied in signal processing (MILJKOVIĆ et al, 2017), thermoacoustics (VALENTIM, 2018), economy , robotics (LEYDEN; GOOD-WINE, 2016), viscoelasticity (DAVID; KATAYAMA, 2013), chemical kinetics (SINGH; KUMAR; BALEANU, 2017), electromagnetism (MESCIA; BIA; CARATELLI, 2019), agricultural computing ), traffic control (KUMAR et al, 2018, among other areas (DAVID; MAINARDI, 2018;O'REGAN;BALACHANDRAN, 2010). In fact, what could be coined as "fractional mathematical oncology" already exists, with many recent studies deploying non-integer calculus to deal with cancer-related topics including chemotherapy, radiotherapy and immunotherapy dynamics (UCAR; ÖZDEMIR; ALTUN, 2019;YILDIZ;ARSHAD;BALEANU, 2018;FARAYOLA et al, 2020;KHAJANCHI;NIETO, 2019), numerical solution and control for invasion systems (MANIMARAN et al, 2019;DAI;LIU, 2019), bioengineering (IONESCU et al, 2017), and tumor growth (SOWNDARRAJAN et al, 2019;SOLÍS-PÉREZ;GÓMEZ-AGUILAR;ATANGANA, 2019ATANGANA, , 2019REN;YU;CHEN, 2018;BOLTON et al, 2015). The increasing number of studies in this area might support fractional calculus as alternative reductionist phenomenological modeling (approach) to further investigate early avascular general tumor growth governed by ODEs.…”