Nursing care
Leukemia in Children nursing care: what to assess and what to do first
Written and reviewed by Dana Whitfield, RN, MSN · 5 min read · Updated September 2026
Short answer
Leukaemia in children is a cancer of the blood-forming cells that presents with bruising, pallor, and bone pain as normal blood cell production is crowded out. Once treatment starts, the nursing priority shifts to preventing and catching infection early, because chemotherapy-induced neutropenia is a greater immediate threat to the child than the leukaemia itself.
What it is and why it happens
Acute lymphoblastic leukaemia, the most common childhood cancer, begins when immature lymphoid cells in the bone marrow multiply uncontrollably and fail to mature into functional white cells. These abnormal cells crowd out normal marrow production, so red cells, platelets, and healthy white cells all fall as the leukaemic clone expands.
Acute myeloid leukaemia is less common in children but follows the same basic mechanism in a different cell line. In both, the child's symptoms trace directly back to which cell line is suppressed: fewer red cells cause pallor and fatigue, fewer platelets cause bruising and bleeding, and fewer functional white cells cause recurrent or unusual infections, even while the total white cell count on a blood film can look deceptively high due to circulating blast cells.
How it presents — what you will actually see
Parents often describe a child who has been tired, pale, and off their food for weeks, with bruises that seem disproportionate to the child's activity level or that appear on unusual sites like the trunk or back rather than the shins and knees typical of an active child. Petechiae, nosebleeds that take longer than usual to stop, and gum bleeding are common alongside this.
Bone pain is a symptom that gets missed because young children cannot describe it well. Watch for a toddler who refuses to walk or bear weight, or an older child complaining of leg or joint pain that wakes them at night, since this reflects marrow expansion pressing against the bone itself. Low-grade fever, lymphadenopathy, and hepatosplenomegaly frequently accompany these signs and, together, should prompt urgent referral rather than reassurance.
Nursing assessment priorities
On admission, a full blood count with differential and a careful skin and mucous membrane check establish the baseline. Look specifically for petechiae, ecchymoses, and any active bleeding from gums, nose, or venepuncture sites, and document their extent so change can be tracked accurately over subsequent shifts.
Temperature monitoring becomes a nursing priority that does not relax once treatment begins, because fever in a neutropenic child is a medical emergency regardless of how well the child otherwise looks. Assess for any potential source of infection at every shift, including the mouth, perianal area, and any central line site, since these are the areas where infection most often takes hold first in an immunocompromised child.
Interventions and what to do first
Once treatment starts, the nursing priority is infection prevention, not comfort measures for the cancer symptoms, because chemotherapy will drive the neutrophil count lower before the leukaemia is controlled. Strict hand hygiene, neutropenic precautions, and prompt reporting of any temperature above 38°C take precedence over almost everything else on the care plan.
Bleeding precautions run alongside this: avoid intramuscular injections and rectal temperatures, use soft toothbrushes, and hold pressure longer after any needle stick. Administer blood products as ordered when platelet or haemoglobin counts drop below threshold, and manage chemotherapy side effects such as nausea and mucositis proactively, since a child who cannot eat or drink because of a sore mouth is also a child at higher infection risk from breakdown of the oral mucosal barrier.
Complications to watch for
Febrile neutropenia is the complication that defines the acute treatment phase. Any fever in a child with an absolute neutrophil count below 500 requires immediate blood cultures and broad-spectrum antibiotics within the hour, not the next round of observations, because sepsis can progress within hours in a child with no functional immune defence.
Tumour lysis syndrome can occur shortly after treatment begins, as the rapid destruction of leukaemic cells releases potassium, phosphate, and uric acid faster than the kidneys can clear them. Monitor electrolytes closely in the first days of induction and watch for signs of acute kidney injury. Longer term, watch for signs of relapse such as returning bruising or fatigue, and be alert to the cumulative toxicity of chemotherapy on the heart, liver, and growth.
Patient teaching before discharge
Families need concrete, specific instructions rather than general reassurance. Teach them to check a temperature at the first sign the child seems unwell and to treat any reading above 38°C as a reason to call the treatment centre immediately, day or night, rather than waiting to see if it settles.
Cover the practical side of neutropenic precautions at home: avoiding crowds and anyone who is unwell, careful food handling to reduce infection risk, and good hand hygiene for everyone in the household. Explain why routine childhood vaccinations may need to be delayed or given differently during treatment. Make sure the family understands the medication schedule for any maintenance chemotherapy taken at home, since missed or incorrect doses can affect long-term outcomes.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our pediatrics practice questions are the closest set to what this page covers.
Common questions
Why is infection a bigger concern than the leukaemia during treatment?
Chemotherapy suppresses the bone marrow further before it recovers, leaving the child with very few functional neutrophils to fight infection. A minor infection can become life-threatening sepsis within hours in this state, which is why fever in a neutropenic child is treated as an emergency regardless of how mild it looks.
What blood counts should a nurse watch most closely?
Absolute neutrophil count guides infection precautions, platelet count guides bleeding precautions, and haemoglobin guides transfusion decisions. All three are checked regularly through treatment because they can shift quickly, particularly around chemotherapy cycles.
Can children with leukaemia go to school during treatment?
It depends on the treatment phase and the child's neutrophil count. Many children can attend school during maintenance therapy when counts are more stable, but families should follow their treatment centre's specific guidance and avoid school during periods of severe neutropenia.
What is the survival outlook for childhood ALL?
Outcomes vary by subtype, genetic markers, and response to initial treatment, so families should discuss prognosis with the child's oncology team rather than relying on general statistics, which can be misleading for an individual case.