This present invention relates to forms of methyl {4,6-diamino-2-[1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridino-3-yl]pyrimidino-5-yl}methylcarbamate comprising its Modification I, Modification II, mono-DMSO solvate, sesqui-DMSO solvate and ¼-ethyl acetate solvate.