Thank you for your query.
Anisopoikilocytosis means that the red blood cells are of different sizes and shapes. The microcytic hypochromic anaemia
suggests that it is due mainly to iron deficiency
. It is better to get him further investigated:
1. Serum iron
2. Serum ferritin level.
3. Stool for occult blood.
I hope I have responded to your query to your satisfaction.
Wishing your son all the best.