Chronic
vs Acute ITP
Characteristic
Acute ITP
Chronic ITP
Age
at onset
Sex
preference
Prior
infection
Onset of bleeding
Plt count
Duration
Spontaneous remission
Seasonal pattern
Therapy:
Steroids
Splenectomy
2 – 6 years
none
common
sudden
<20.0 x 109/L
2-6 weeks
90% of cases
Higher winter & spg
70% response
rare
20-50 years
F 3:1 over M
unusual
gradual
30.0 – 80.0 x 109/L
Months - years
uncommon
none
30% response
<45 90%
>45 40%