“…The natural history of FNH is characterized by the absence of complications. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] In our series, 50% of nodules have grown bigger with a median delay of 47 months, but all remained asymptomatic. No malignant transformation has been reported to date, a reassuring fact considering the incidence of second tumors following HSCT.…”