An 8-year-old boy has been diagnosed with hemophilia. Which of the following diagnostic blood studies is characteristically abnormal in this disorder?
A. Partial thromboplastin time
B. Platelet count
C. Complete blood count
D. Bleeding time
An 8-year-old boy has been diagnosed with hemophilia. Which of the following diagnostic blood studies is characteristically abnormal in this disorder?
A. Partial thromboplastin time
B. Platelet count
C. Complete blood count
D. Bleeding time