Megaloblastic anaemia masking polycythaemia rubra vera.
D000368:Aged; D000752:Anemia, Pernicious / Q000150:complications*; D005260:Female; D005494:Folic Acid Deficiency / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011087:Polycythemia Vera / Q000150:complications* / Q000175:diagnosis