A plastic anemia is more like a external factor related disease,related factors:1.Drug
It is the most common cause of disease.2. Chemical poisons3. Ionizing radiation4. Virus infection5. Immunity factors6. Genetic factors
Fanconi anemia, congenital keratosis, Schwachman-Diamond syndrome are mostly autosomal recessive hereditary diseases, and are familial.7. Paroxysmal nocturnal hemoglobinuria (PNH)
try to avoid these controllable factors
check the blood test regullary,ESPECIALLY at the on-set age of your mother and grandmother
it's hard to say your chance of AA.