Final answer:
Hemolytic-uremic syndrome (HUS) is characterized by decreased platelet count and leukocytosis.
Step-by-step explanation:
Hemolytic-uremic syndrome (HUS) is a condition characterized by the destruction of red blood cells, kidney damage, and low platelet count. Review of a child's laboratory test results with HUS would reveal decreased platelet count and leukocytosis. Platelets are responsible for blood clotting, and a decrease in platelets can lead to abnormal bleeding and bruising. Leukocytosis refers to an increased number of white blood cells, which can be a sign of infection or inflammation. Therefore, option B) Decreased platelets and leukocytosis would be the correct answer.