U.S. doctors online nowAsk doctors free
United Kingdom
A 30-year-old female asked:

1yr old has bruise on leg bloods came back platlelet 90 neutrophils 0.7 why are the requesting second blood test?

2 doctor answers2 doctors weighed in
Dr. Ivy Fisher
Pediatrics 46 years experience
Rule out illness: When infants/toddlers have bruises in unsuspecting areas, blood tests are done to rule out ITP (idiopathic thrombocytopenia purpura). This is an autoimmune disorder, self-limited and lower platelet counts occur with the bruises. It should be monitored since if the Platelets drop below 10,000 they often need admission to a hospital or treated as an outpatient. You should follow up on the tests.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. James Ferguson
Pediatrics 48 years experience
Confirmation: The numbers you give are not very helpful but platelets of 90(thousand) are on the low side.What .7 neuts refers to is confusing. You repeat a test to see if the initial test was wrong, the levels change or to define the problem more clearly. Low platelets could be a technical glitch, a problem with production or excessive destruction.Further testing narrows your search.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Sep 26, 2016


Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.