Care of the Pediatric Patient with Hematologic and Oncologic Disorders
Foundations of pediatric hematology-oncology assessment
Care of the child with a hematologic or oncologic disorder begins with recognizing that pediatric reference ranges, presentations, and priorities differ from adults. Candidates should know how to interpret a complete blood count using age-specific norms, calculate the absolute neutrophil count, and distinguish expected marrow suppression from urgent complications. Assessment includes trends in counts, bleeding or bruising, fever, pain, nutritional intake, growth, developmental stage, central-line status, and family understanding. Leukemia often presents with cytopenias and blasts; solid tumors may present with a mass, pain, or constitutional symptoms. Sickle cell disease, thalassemia, hemophilia, immune thrombocytopenia, and coagulopathies each have distinct monitoring priorities.
Question traps include applying adult laboratory ranges to children, equating petechiae with a benign rash, assuming lymphadenopathy is always malignant, or treating a well-appearing neutropenic child as low risk. Fever in a neutropenic child is an emergency even when the examination is reassuring. Avoid relying on a single platelet count to predict bleeding; assess mucosal bleeding, headache, and signs of intracranial hemorrhage. Family-centered communication and infection prevention are part of every encounter.
Worked example: a 6-year-old receiving chemotherapy has WBC 1,200/µL, 20% segmented neutrophils, and 5% bands. ANC = 1,200 × (0.20 + 0.05) = 300/µL, which is severe neutropenia. A temperature of 38.3°C warrants immediate provider notification, cultures, and empiric antibiotics per protocol-not observation at home.
Rule of thumb: when a pediatric oncology patient has fever and neutropenia, treat first and investigate simultaneously.