[Biopsy diagnosis of myelofibrosis--with analysis of 21 cases].
D000328:Adult; D001706:Biopsy; D001853:Bone Marrow / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D055728:Primary Myelofibrosis / Q000175:diagnosis* / Q000473:pathology